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 "Nelson, Richard R. and International Economic Association. World Congress","R&D, knowledge, and externalities : an approach to the puzzle od disparate productivity growth rates among manufacturing industries",,s.n.],1977,General theme : economic growth and resources,,,,https://cir.nii.ac.jp/crid/1130000793891081472