OSBORN, Roger  DEVAULT, M. Vere <br/><br/>
Extending mathematics understanding  x 

 - x 
 - Colombus  Merrill  1963 
 - viii, 310p 
<br/><br/>
<br/><br/><label>ISBN: </label>x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MATHEMATICS MATHEMATICS 
<br/><br/><label>Dewey Class. No.: </label>510/OSE