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
"Hekken, P. M. van and Thoden van Velzen, H. U. E.",Land scarcity and rural inequality in Tanzania : some case studies from Rungwe District,,"Mouton,Afrika-Studiecentrum",1972,Communications,,,,https://cir.nii.ac.jp/crid/1130282272322565376