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
"Böckstiegel, Karl-Heinz and Universität Köln. Institut für Luft- und Weltraumrecht and International Institute of Space Law and International Law Association. Space Law Committee","Environmental aspects of activities in outer space : state of the law and measures of protection : proceedings of an International Colloquium Cologne, May 16-19, 1988 organized by the Institute of Air and Space Law, University of Cologne in cooperation with the International Institute of Space Law and the Space Law Committee of the International Law Association",,C. Heymann,1990,Schriften zum Luft- und Weltraumrecht = Studies in air and space law = Études de droit aérien et spatial,,3452213560,,https://cir.nii.ac.jp/crid/1130282270504075904