Heddens, James W. <br/><br/>
Today's mathematics  a guide to concepts and methods in elementary school mathematics 
James W. Heddens. 
 - 3d ed. 
 - Palo Alto, Calif.  Science Research Associates  c1974. 
 - ix, 566 p.  ill. 
<br/><br/> 920901 
<br/><br/>Includes bibliographies and index. 
<br/><br/><label>ISBN: </label>057418600X 
<br/><br/><label>LCCN: </label>74026511  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Study and teaching (Elementary)
<br/><br/><label>LC Class. No.: </label>QA135.5  / .H42 1974 
<br/><br/><label>Dewey Class. No.: </label>372.7/3