Wolfe, Harold Eichholtz. <br/><br/>
Introduction to non-Euclidean geometry 

 - Mineola, N.Y. :  Dover Publications,  ©2012. 
 - xiii, 247 p. :  ill. (b&w) ;  21.5 cm (Paperback) 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>9780486498508 0486498506 
<br/><br/><label>Subjects--Index Terms: </label>Geometry, Non-Euclidean. Geometry 
<br/><br/><label>Dewey Class. No.: </label>516.9  / WOL / G