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
National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.),"Trends in size and production of the aggregate farm enterprise, 1909-36 . Trends in employment in agriculture, 1909-36",,"Works Progress Administration, National Research Project",1938,Report,,,,https://cir.nii.ac.jp/crid/1130282272581278848