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,"Characteristics of the population below the poverty level, 1976",[Microfiche ed.],Congressional Information Service,1978,Current population reports,,,,https://cir.nii.ac.jp/crid/1130000795779645824