1.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | F 6351(13) DE 29 |
2.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | T 91 DE 28 |
3.
[Place of publication not identified] : [publisher not identified], 1992.
German | M 234(13) DE 29 |
4.