1.
|
Köln : Heymann, c1991.
German | G 22 WEL.S |
|
2.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | T 23 DE 28 |
|
3.
|
Köln : C. Heymanns, c1990.
German | F 13 FES |
|
4.
|
Weinheim : VCH Verlagsgesellschaft, c1991.
German | F 13 GEW |
|
5.
|
Bern [Switzerland] : STèAMPFLI, 2001.
German | F 67 HIL.L |
|