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.),"Changes in technology and labor requirements in crop production : corn, cotton, wheat and oats",,"Work Projects Administration, National Research Project",1939,Report,,,,https://cir.nii.ac.jp/crid/1130000798199854848