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5.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1988.
German | 29 DE |
6.
7.
8.
[Place of publication not identified] : [publisher not identified], 1989.
Portuguese | 29 DE |
9.
[Place of publication not identified] : [publisher not identified], 1989.
Portuguese | 29 DE |
10.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1993.
German | 29 DE |