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
"Willard, Rex E. (Rex Elton) and Metzger, Hutzel and Thorfinnson, T. S. (Theodore Skulason)","Cost of production and farm organization on 126 farms in North Dakota, 1921 and other economic data",,"Agricultural Experiment Station, the North Dakota Agricultural College",1922,Bulletin,,,,https://cir.nii.ac.jp/crid/1130000798193307136