Graphs of groups on surfaces : 
White, Arthur T. 
 - 1st ed. 
 - Amsterdam ; | New York :  Elsevier,  2001 
 - xiv, 363 p. :  ill. ;  25 cm. 
 - North-Holland mathematics studies,  188 .
<br/><br/><label>ISBN: </label>0444500758 (hc.)