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 Symposium on the Importance of the Patent System to Developing Countries and World Intellectual Property Organization,The Importance of the patent system to developing countries : collection of lectures given at the World Symposium,,WIPO,1977,WIPO publication,,,,https://cir.nii.ac.jp/crid/1130000794768538752