Heckenbach, Alan J <br/><br/>
Elementary functions  : an approach to precalculus mathematics 
Heckenbach, Alan J 
 - New York:  Macmillan,  1970 
 -  356p 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculus
<br/><br/><label>Dewey Class. No.: </label>515  / HEE