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
Ahmadu Bello University. Institute for Agricultural Research,Farm income levels in the northern states of Nigeria,,"Institute for Agricultural Research, Ahmadu Bello University",1972,Samaru miscellaneous paper,,,,https://cir.nii.ac.jp/crid/1130282268747562752