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 "Gregory, David D. and Diot, A. and Dietrich, H. J.",The easement as a conservation technique,,International Union for Conservation of Nature and Natural Resources,1972,IUCN environmental policy and law paper,,,,https://cir.nii.ac.jp/crid/1130000796487851008