LANKFORD, F. G. <br/><br/>
Essential Mathematics 

 - 3rd Ed. 
 - New York,  Harcourt Brace Jovanovich,  1975. 
 - viii, 536p.: ill.; graph, picture, table.   Index.  24cm. 
<br/><br/><label>ISBN: </label>0-15-353190-8 
<br/><br/><label>Dewey Class. No.: </label>513 LAN