Bibliography
Bibliography of Vitality: 
   
    
              Gabriele Sommer. 1992. "A Survey On Language Death in Africa." In Language death: factual and theoretical explorations with special reference to East Africa,  edited by Matthias Brenzinger. 402. Mouton de Gruyter.
      
  
Bibliography of Locations: 
   
    
              Gabriele Sommer. 1992. "A Survey On Language Death in Africa." In Language death: factual and theoretical explorations with special reference to East Africa,  edited by Matthias Brenzinger. 402. Mouton de Gruyter.
      
  
Bibliography of Context: 
   
  
  
  
  
  
  
  
  
    
              Gabriele Sommer. 1992. "A Survey On Language Death in Africa." In Language death: factual and theoretical explorations with special reference to East Africa,  edited by Matthias Brenzinger. 402. Mouton de Gruyter.