1
by Abels, Heiner, Degen, Horst
Published 1986
Vieweg+Teubner Verlag

2
by Abels, Heiner, Degen, Horst
Published 1978
Gabler Verlag

3
by Abels, Heiner, Degen, Horst
Published 1989
Gabler Verlag

4
by Abels, Heiner, Degen, Horst
Published 1985
Gabler Verlag