1.
|
[Heidelberg, Germany] : [Springer], 1975.
English | 34 DE |
|
2.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1974.
German | 29 DE |
|
3.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1976.
German | 28 DE |
|