1.
|
Koeln Et Al : Heymann, 1993.
German | H 30 ECK.N |
Available |
|
2.
|
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1992.
German | G 81(121) DE 28 |
Available |
|
3.
|
Köln : C. Heymanns, c1990.
German | F 13 FES |
Available |
|
4.
|
Weinheim : VCH Verlagsgesellschaft, c1991.
German | F 13 GEW |
Available |
|