1.
2.
Courbevoie [France] : Institut National de la Propriété Industrielle, 1971.
French | 10A OMPI |
3.
4.
5.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1971.
German | 29 DE |
6.
7.
8.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1980.
German | 29 DE |