Durell, Clement V. <br/><br/>
A concise geometrical conics, 

 - London,  Macmillan and co., limited,  1941. 
 - xvi, 99, [1] p.  diagrs.  19 cm. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Conic sections.<br/>MCE
<br/><br/><label>Dewey Class. No.: </label>516  / DUR