Magnus Wilhelm <br/><br/>
Noneucliden tesselations and their groups 

 - p.  cm. 
 - Pure and Applied Matheatics .
<br/><br/><label>Standard No.: </label>20036 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>B27, L47