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,"Unemployment returns by classes for states and counties, for urban and rural areas, and for cities with a population of 10,000 or more",,U.S. Govt. Print. Off.,1931,"Fifteenth census of the United States, 1930",,,,https://cir.nii.ac.jp/crid/1130000797661337344