1.
|
[Place of publication not identified] : [publisher not identified], 1993.
German | 29 DE |
|
2.
|
Zürich : Schulthess, c1993.
German | N 612 LOC.I |
|
3.
|
Genf : World Intellectual Property Organization, 1981.
German | N 613 MAS.K |
|
4.
|
[Place of publication not identified] : [publisher not identified], 1993.
German | 29 DE |
|