                                                                                                                                                                                                                                                                                                                                                             100                             
   
                                                                                                                                                                                                                                                                                                                                                   
   
                                                                                                                                                                                                                     
  
                                                                                                       
  
                                  100                                                                                     nomadism                                                                              
   
                                                                                       
  
                                                                                                                                 
   
          1966                                                                                                                                                                         
   
                                                                                                                                                                                                  
   
                                                                                                                                                                                                                                                                                                                                 
   
                                                               
   
                                                                                                                                                                                                                                                                               
   
                                                                                                                                    
   
                 