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
"Haskell, A. Porter and Kiessling, O. E. (Oscar Edward) and National Research Project on Reemployment Opportunities and Recent Changes in Industrial Techniques (U.S.) and United States. Bureau of Mines","Technology, employment, and output per man in phosphate-rock mining, 1880-1937",,"Works Progress Administration, National Research Project",1938,Report,,,,https://cir.nii.ac.jp/crid/1130282271405588352