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
"Tuin, H. van der and International Hydrological Programme. Working Group of Project 4.4b (IHP-III)",Guidelines on the study of seawater intrusion into rivers,,UNESCO,1991,Studies and reports in hydrology,,9231027654,,https://cir.nii.ac.jp/crid/1130282269189558016