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
,"Corn, yields per acre and prices, by States, 50 years 1866-1915",,U.S. Department of Agriculture,1917,Bulletin,,,,https://cir.nii.ac.jp/crid/1130000796638705408