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 farm power and equipment : tractors, trucks, and automobiles, field implements, mechanical cotton picker",,"Work Projects Administration, National Research Project",1939,Report,,,,https://cir.nii.ac.jp/crid/1130282272535662080