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 "Howe, Ernest","Landslides in the San Juan Mountains, Colorado including a consideration of their causes and their classification",,Govt. print. off,1909,Geological Survey professional paper,,,,https://cir.nii.ac.jp/crid/1130282273124406656