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International Classification of Patents: Joint Ad Hoc Committee : Conseil de l'Europe : BIRPI/WIPO 1970-[12 Sessions]
United International Bureaux for the Protection of Intellectual Property, author[...]
Geneva, Switzerland : United International Bureaux for the Protection of Intellectual Property, 1970.
English | E 2354G1322 OMPI.B(F/E) |
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