Sommerville, D. M. Y.  1879-1934 <br/><br/>
The elements of non-euclidean geometry / 
D. M. Y. Sommerville 
 - London :  C. Bell,  1914 
 - xiv, 274 p. :  ill. ;  22 cm. 
<br/><br/> Includes index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geometry, Non-Euclidean
<br/><br/><label>Dewey Class. No.: </label>513.8