Sommerville, D. M. Y.   1879-1934. <br/><br/>
Bibliography of non-Euclidean geometry/ 
Sommerville, D. M. Y. Som merville. 
 - [2d ed.] 
 - New York:   Chelsea Pub. Co.,   [1970] 
 - xii, 410 p.;   21 cm. 
<br/><br/><label>ISBN: </label>0828401756 
<br/><br/><label>LCCN: </label>72-113150 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Geometry, Non-Euclidean-- Bibliography.
<br/><br/><label>Dewey Class. No.: </label>016.513/8