The human ecology of mental retardation: implications for social policy development in Tanzania / 
Leonard B. Mbilinyi  
 - Saarbrucken :  Verlag Breitenbach Publishers,  1993. 
 - xiii, 195 p. : 
<br/><br/> Include references 
<br/><br/><label>ISBN: </label>01717537 
<br/><br/><label>LC Class. No.: </label>GF54.17  / .M2 1993