1.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1974.
German | 28 DE | Available |
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1986.
German | 28 DE | Available |
3.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1978.
German | 28 DE | Available |
4.
5.
6.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1973.
German | 28 DE | Available |