TY  - DATA
AU  - Heiner Zieschang
AU  -  Elmar Vogt
AU  -  Hans-Dieter Coldewey
TI  - Surfaces and Planar Discontinuous Groups
T2  - Lecture Notes in Mathematics
SN  - 9783540699811
PY  - 1980///
CY  - Heidelberg
PB  - Springer Berlin
KW  - Mathematics and Statistics
UR  - https://doi.org/10.1007/BFb0089692
ER  -