1.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | N 6318(13) DE 28 |
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1991.
German | N 621 DE 29 |
3.
Nomos-Verl.-Ges : Baden-Baden [Germany], 1992.
German | N 63180(254) DE 24 |
4.