1.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | 29 DE | Available |
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1980.
German | 28 DE | Available |
3.
4.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1990.
German | 29 DE | Available |
5.
6.
7.
8.
9.
10.