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
World Intellectual Property Organization,"Guide, survey of classes and summary of main groups",5th ed,"World Intellectual Property Organization,C. Heymanns Verlag",1989,International patent classification,,3452214168,,https://cir.nii.ac.jp/crid/1130000793846641792