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 Nature Conservancy (U.S.) and United States. National Park Service. Office of the Chief Scientist,Federal activities,,"The Office : for sale by the Supt. of Docs., U.S. Govt. Print. Off.",1975,Preserving our natural heritage,,,,https://cir.nii.ac.jp/crid/1130282273033720192