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
"Leverett, Frank and Purssell, U. G.",Surface formations and agricultural conditions of Northwestern Minnesota,,University of Minnesota,1915,Bulletin (Minnesota Geological Survey),,,,https://cir.nii.ac.jp/crid/1130282269131828736