IIASA reports. volume 2, number 2, october-december 1980... 

 - Laxenburg, Austria : International Institute for Applied Systems Analysis 
 - [245] p. 
<br/><br/> "Population, resources, and growth".Contenido: Comparative dynamics of three demographic models- of urbanization / Jacques Ledent. -- Determinants of rural--to-urban migration in Kenya / H. Rempel...