1.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1991.
German | 28 DE | Available |
2.
[Hong Kong, China] : [China Patents & Trademarks Publications], 1991.
English | 7 CN | Available |
3.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1991.
German | 28 DE | Available |