Dienes, Zoltan P. (Zoltan Paul) <br/><br/>
Building up mathematics. 

 - [3rd ed., rev. and expanded. 
 - [London] :  Hutchinson Educational,  [c1967] 
<br/><br/> Imprint date varies. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics -- Study and teaching.--Mathematics -- Study and teaching.