Lankford, Francis G. <br/><br/>
Essential mathematics  / 
Francis G. Lankford, James F. Ulrich and John R. Clark. 
 - New York :   Brace & World,   c 1961. 
 - viii, 536 p. :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/>315  315 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.
<br/><br/><label>Dewey Class. No.: </label>510 / L276e