Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
European Space Agency,"The Comet Halley dust & gas environment : proceedings of a joint NASA/ESA working group meeting, Heidelberg, [Germany], 26 and 27 August 1981",,European Space Agency,1981,ESA SP,,,,https://cir.nii.ac.jp/crid/1130282269346869120