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,Official catchword index to the seventh edition (1999) of the international patent classification,,WIPO,1999,WIPO publication,,9880508017,,https://cir.nii.ac.jp/crid/1130000793786483456