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. Department of Agriculture. Conservation Needs Inventory Committee and United States. Bureau of Indian Affairs and United States. Dept. of the Interior and United States. Agricultural Stabilization and Conservation Service,"Basic statistics, national inventory of soil and water conservation needs, 1967",,"U.S. Dept. of Agriculture,For sale by the Superintendent of Documents, U.S. G.P.O.",1971,Statistical bulletin,,,,https://cir.nii.ac.jp/crid/1130000797250781824