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[Geneva, Switzerland] : [World Intellectual Property Organization], 1980.
English | 6B OMPI |
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Stockholm : Allmèanna Fèorlaget, 1990.
Fourth edition.
Swiss german | N 16 OLS.C(4) |
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Stockholm [Sweden] : Nordiskt Immateriellt Rättsskydd (NIR), 1981.
Swiss german | 3 SE |
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