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,Summary of the census of agriculture for the United States 1919 and 1920,,G.P.O.,1923,Fourteenth census of the United States taken in the year 1920,,,,https://cir.nii.ac.jp/crid/1130000795340792192