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
U. S. Bureau of Intelligence and Research. Office of the Geographer,"Costa Rica-Nicaragua boundary, August 16, 1976",,U. S. Bureau of Intelligence and Research. Office of the Geographer,,International boundary study,,,,https://cir.nii.ac.jp/crid/1130282270498664320