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
"Helgren, David M.","Rivers of diamonds : an alluvial history of the Lower Vaal Basin, South Africa",,"University of Chicago, Dept. of Geography",1979,Research paper,,0890650926,,https://cir.nii.ac.jp/crid/1130282271186807936