TY  - BOOK
AU  - Zieschang, Heiner
AU  - Vogt, Elmar
AU  - Coldewey, Hans Dieter
AU  - Stillwell, J.
TI  - Surfaces and planar discontinuous groups
T2  - Lecture notes in Mathematics
U1  - 514 
PY  - 1980///
CY  - Berlin
PB  - Springer-Verlag
N1  - "Translated from the German by J. Stillwell"
ER  -