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
United States. Bureau of the Census,"General report : unemployment by occupation, April, 1930, with returns from the special census of unemployment, January, 1931",,U.S. Govt. Print. Off.,1932,"Fifteenth census of the United States, 1930",,,,https://cir.nii.ac.jp/crid/1130000796077530624