1.
2.
3.
4.
[Place of publication not identified] : [publisher not identified], 1983.
English | 29 DE |
5.
Stockholm [Sweden] : Nordiskt Immateriellt Rättsskydd (NIR), 1978.
Danish | 3 SE |
6.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1984.
German | 29 DE |
7.
8.
9.
10.
[Geneva, Switzerland] : [World Intellectual Property Organization], 1988.
English | N 44P13(16) OMPI 6B |