Stillwell, J <br/><br/>
Source of hyperbolic geometry 
J. Stillwell 
 - Providence  American Mathematical Society  1996 
 - ix  153  153 
 - History of mathematics 10 .
<br/><br/><label>ISBN: </label>9780821809228 
<br/><br/><label>Dewey Class. No.: </label>516.36  / STI