1.
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1972.
German | 29 DE |
3.
4.
5.
6.
7.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1991.
German | 29 DE |
8.
9.
10.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1977.
Danish | 29 DE |