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 United States. Army Map Service,Malakal,Ed. 4-AMS,"Army Map Service, Corps of Engineers, U.S. Army",1960,"World (Africa) 1:1,000,000",,,,https://cir.nii.ac.jp/crid/1130282269020146304