Stahl, Saul. <br/><br/>
A gateway to modern geometry  the Poincar ̌half-plane /  [Book] : 
Saul Stahl. 
 - 2nd ed. 
 - Sudbury, Mass. :  Jones and Bartlett Publishers,  c2008. 
 - viii, 255 p. :  ill. ;  25 cm. 
<br/><br/> Rev. ed. of: Poincar ́́̌half-plane. Boston : Jones and Bartlett Publishers, c1993. 
<br/><br/> All. 
<br/><br/><label>ISBN: </label>0763753815 9780763753818 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Non-Euclidean.
<br/><br/><label>Dewey Class. No.: </label>516.9