著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Njeru, Geoffrey R.","Livelihood diversification and entrepreneurship : an analysis of production and marketing innovations in smallholder farming in a rural Kenyan district, Mbeere",,"Institute for Development Studies, University of Nairobi",2003,Working paper,,,,https://cir.nii.ac.jp/crid/1130000797200296192