Improving mathematics programs :  Trends and issues in the elementary school / 
Edited by M. Vere Devault 
 - Columbus ;  Charles E. Merrill Books ,  1961 . 
 - xxi, 552pages :  20 cm . 
<br/><br/> Includes an index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics-study teaching
<br/><br/><label>LC Class. No.: </label>QA 135 Imp