Stahl, Saul <br/><br/>
A gateway to modern geometry:   the Poincaré half-plane/  	 
Saul Stahl. 
 - 2nd edition 
 - Sudbury, Mass.:   Jones and Bartlett Pub.,   c2008. 
 - viii, 255 pages:   illustrations;  24 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>978-0-7637-5381-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry
<br/><br/><label>Dewey Class. No.: </label>DC 516.9  / St19