Ryan, Patrick J. <br/><br/>
Euclidean and non-Euclidean geometry :  an analytical approach / 
Patrick J. Ryan. 
 - xvii, 215 pages :  illustration ;  24 cm 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0521256542 0521276357 9780521256544 9780521276351 
<br/><br/><label>LCCN: </label>85017146  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Plane<br/>Geometry, Non-Euclidean
<br/><br/><label>LC Class. No.: </label>QA445  / .R93 1986