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. Dept. of Agriculture. Committee on Land Economics,Report of committee appointed by the Secretary of Agriculture to consider the subject of land economics as one of the divisions of research work of the proposed Bureau of Farm Management and Farm Economics,,"U.S. Dept. of Agriculture, Office of the Secretary",1919,Circular,,,,https://cir.nii.ac.jp/crid/1130000794022993024