Traffon, Paul R. <br/><br/>
New directions for elementary school mathematics / 
Paul R. Traffon, Albert P. Shulte 
<br/><br/> College of Education  Bachelor of Elementary Education 
<br/><br/><label>ISBN: </label>0-87353-272-4 
<br/><br/><label>Dewey Class. No.: </label>510 T67