1.
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Genève : Droz, 1979.
French | M 246 VAN.M |
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2.
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New York : Van Nostrand Reinhold, c1980.
English | M 246 REI.C |
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3.
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Ginebra [Colombia] : Organización Mundial de la Propiedad Intelectual, 1978-
Spanish | E 2314T23 OMPI.COPR (F/E/S) |
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4.
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Geneva [Switzerland] : World Intellectual Property Organization, 1978-
English | E 2314T23 WIPO.COPR (F/E/S) |
|