1.
[Place of publication not identified] : [publisher not identified], 1997.
Spanish | 8 AR |
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1996.
German | 29 DE |
3.
4.
5.
[Place of publication not identified] : [publisher not identified], 1995.
German | 9 DE |