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 Conference on Road Traffic and League of Nations. Communications and Transit Organisation and League of Nations,European Conference on Road Traffic : preparatory documents,,League of Nations,1930,Series of League of Nations publications,,,,https://cir.nii.ac.jp/crid/1130000796979583488