1.
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1971.
German | 28 DE |
3.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1990.
German | 28 DE |
4.
5.
6.
7.
8.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1974.
Portuguese | 28 DE |
9.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1980.
German | 28 DE |