Zieschang, Heiner <br/><br/>
Surfaces and planar discontinuous groups  / 

 - Berlin:  Springer-Verlag,  1980 
 - ix, 334p. Index, Bibl. 
 - Lecture notes in Mathematics   835 .
<br/><br/> "Translated from the German by J. Stillwell" 
<br/><br/><label>Dewey Class. No.: </label>514  / Z67.SP