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1.
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[Place of publication not identified] : [publisher not identified], 1991.
French | P 1423 UNESCO 3C |
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2.
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[Paris, France] : [UNESCO], 1991.
English | P 1423 UNESCO 3A |
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3.
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[Paris, France] : [UNESCO], 1978.
French | 6A OMPI |
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4.
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[Paris, France] : [UNESCO], 1991.
English | P 1423 UNESCO 3B |
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5.
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[Geneva, Switzerland] : [World Intellectual Property Organization], 1978.
English | 6B OMPI |
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