Sommerville, D. M. Y. <br/><br/>
Analytical conics 

 - 3rd ed. 
 - London  : G. Bell and Sons,  1951 
 - viii,310p.  : ill.  ; 22cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Conics
<br/><br/><label>LC Class. No.: </label>QA559.S64