1.
|
Köln : C. Heymanns, c1990.
German | F 13 FES |
|
2.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | 28 DE |
|
3.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | F 40 DE 28 |
|