LANKFORD, Francis G. , ULRICH, James F, CLARK, John R. <br/><br/>
Essential Mathematics 

 -  New York , Harcourt Brace & World  1961 
 - 536 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>051  / L15