1.
[Geneva, Switzerland] : [World Intellectual Property Organization], 1969.
English | 6B OMPI |
2.
[Geneva, Switzerland] : [World Intellectual Property Organization], 1972.
English | 6B OMPI |
3.
4.
5.
[Heidelberg, Germany] : [Springer], 1983.
English | 34 DE |
6.
7.
Courbevoie [France] : Institut National de la Propriété Industrielle, 1963.
Italian | 10A OMPI |
8.
9.
[Place of publication not identified] : [publisher not identified], 1976.
German | 29 DE |
10.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1971.
German | 28 DE |