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
"Minnesota Geological Survey and Chandler, Val W.",Simple bouguer gravity anomaly map of Minnesota,,"Minnesota Geological Survey, University of Minnesota",1981,State map series,,,,https://cir.nii.ac.jp/crid/1130282273183092992