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 and Royal Thai Survey Department,"Indochina and Thailand 1:250,000",,"The Army Map Service (PV), Corps of Engineers, U.S. Army",,,,,,https://cir.nii.ac.jp/crid/1130000797571623296