1.
Kohn : Carl Heymanns Verlag Kg, 2003.
German | G 252 KRE.P | Available |
2.
Einbeck : Kleinwanzlebener Saatzucht Ag, 1992.
German | G 252 KOE.G | Available |
3.
Cologne [Germany] : German Association for the Protection of Intellectual Property (GRUR), 1993.
German | 28 DE | Available |