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 "Knechtel, Maxwell M. and State of Maryland. Board of Natural Resources. Department of Geology, Mines and Water Resources",Physical properties of nonmarine Cretaceous clays in the Maryland Coastal Plain : prepared in cooperation with the Geological Survey and Bureau of Mines United States Department of the Interior,,"State of Maryland. Board of Natural Resources. Department of Geology, Mines and Water Resources",1961,Bulletin,,,,https://cir.nii.ac.jp/crid/1130282271793250048