- Author: Cornelsen Doris, Scherzinger Angela, Usbeck Hartmut, Lambrecht Horst, Neumann Hans, Radke Sabine, Schmidt Ralf, Schulz Erika, Schwartau Cord
- Language: German
- Year: 1992
- Author: Bethkenhagen Jochen, Hopf Rainer, Melzer Manfred, Schwartau Cord, Cornelsen Doris
- Language: German
- Year: 1988