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Proceedings of Executive Sessions at the Patent Office of the Federal Republic of Germany, Munich, September 4-6, 1962
Committee for International Cooperation in Information Retrieval Among Examining Patent Offices. Meeting
出版Committee for International Cooperation in Information Retrieval Among Examining Patent Offices, 1962
URLhttp://books.google.com.hk/books?id=UsrMHAAACAAJ&hl=&source=gbs_api