1.
2.
3.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | N 6371 DE 28 | Available |
4.
[Place of publication not identified] : [publisher not identified], 1991.
German | 29 DE | Available |
5.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1997.
German | 29 DE | Available |
6.
7.
8.
Müchen [Germany] : Verlag Dokumentation, 1995.
Dutch | 5 DE | Available |
9.
10.
Wien [Austria] : MAN'Sche Verlags- und Universitätsbuchhandlung GmbH, 1990.
German | N 621 DE 24 | Available |