1.
Bern : Stämpfli+Cie, 1996.
German | F 67 WEI.R |
2.
3.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1994.
German | 29 DE |
4.
5.
London : Butterworths, c1997.
150th edition.
English | F 67 STE.P |
6.
7.