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 European Space Agency,"UNESCO-ESA world space week 2002, essay contest, 6-7 October 2002, ESA-ESTEC, Noordwijk, the Netherlands",,European Space Agency Publications Division,2003,ESA SP,,9290928441,,https://cir.nii.ac.jp/crid/1130282271301729024