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
"International Geographical Congress and Enayat Ahmad and Das Gupta, Sivaprasad",Proceedings of symposium on erosion surface : held at Ranchi on 10-13 December 1968,,National Committee for Geography,1970,"21st International Geographical Congress, India 1968 Inde",,,,https://cir.nii.ac.jp/crid/1130000796146487424