1.
2.
Wien [Austria] : MAN'Sche Verlags- und Universitätsbuchhandlung GmbH, 1981.
German | 6 AT |
3.
Buffalo, New York : The Patent and Trademark Office Society, 1985.
English | 47 US |
4.
London [England] : Trade Marks, Patents and Designs Federation, 1984.
French | 41 GB |
5.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1973.
German | 28 DE |