00838nam0-22002771i-450-990001157860403321000115786FED01000115786(Aleph)000115786FED0100011578620000920d1980----km-y0itay50------baengSurfaces and Planar Discontinuous Groupsvon Zieschang,Heiner-VOGT,Elmar-Coldewey, Hans-DieterBerlin [etc.]Springer-Verlag1980Lecture Notes in Mathematics835Zieschang,Heiner55310Coldewey,Hans-DieterVogt,ElmarITUNINARICAUNIMARCBK990001157860403321C-20-(83520083MA1MA1Surfaces and planar discontinuous groups261839UNINAING01