1.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1990.
German | 28 DE |
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1989.
German | 28 DE |
3.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1991.
German | T 23(121) DE 28 |
4.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | 28 DE |