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[Geneva, Switzerland] : [World Intellectual Property Organization], 1984.
English | 6B OMPI |
3.
[Geneva, Switzerland] : [World Intellectual Property Organization], 1981.
Swiss german | 6B OMPI |
4.
[Paris, France] : [UNESCO], 1981.
French | 6A OMPI |
5.
New York, New York : Copyright Society of the USA, 1970.
English | 14 US |
6.
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[Geneva, Switzerland] : [World Intellectual Property Organization], 1982.
English | 6B OMPI |