DRUMMOND, Margaret <br/><br/>
The psychology and teaching of number 

 - London  George G.Harrap  1922 
 - 125 p. 
<br/><br/><label>ISBN: </label>76066 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational psychology
<br/><br/><label>Dewey Class. No.: </label>370.15  / DRU