1.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1976.
German | 28 DE |
|
2.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1982.
German | 28 DE |
|
3.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1974.
German | 28 DE |
|
4.
|
Köln : Heymann, 1980. Third edition.
German | M 33 PAS.W |
|