Spencer, Peter Lincoin <br/><br/>
Building mathematical competence in the elementary school 

 - Revised Edition 
 - New York  Holt, Rinehart and Winston  1966 
 - xii,404  Hb  23.5 
<br/><br/><label>Subjects--Facted Index Terms: </label><br/>
<br/><br/><label>Dewey Class. No.: </label>372.7