White, Arthur T <br/><br/>
Graphs of groups on surfaces  Interactions and models 
by Arthur T White 
 - Amsterdam  Elsevier  2001 
 - North-Holland mathematics studies  188 .
<br/><br/><label>ISBN: </label>0444500758 
<br/><br/><label>Dewey Class. No.: </label>516.352  / P013