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,"Social and economic characterisitics of the metropolitan and nonmetropolitan population, 1977 and 1970",,"U.S. Dept. of Commerce, Bureau of the Census",1978,Current population reports,,,,https://cir.nii.ac.jp/crid/1130282268902409600