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
"Magdoff, Harry and Siegel, Irving H. and Davis, Milton B.","Purpose, methods, and summary of findings",,"Work Projects Administration, National Research Project",1939,Report,,,,https://cir.nii.ac.jp/crid/1130000795489036160