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.) and Leong, Y. S.","Technology, employment, and output per man in copper mining",,"Work Projects Administration, National Research Project",1940,Report,,,,https://cir.nii.ac.jp/crid/1130282270977300352