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. Bureau of the Census,Natural gas liquids : industry 1321,,"U.S. Dept. of Commerce, Bureau of the Census : For sale by Supt. of Docs., U.S. G.P.O.",1990,1987 census of mineral industries : industry series,,,,https://cir.nii.ac.jp/crid/1130282271745376000