Lovell, K <br/><br/>
Growth of basic mathematical and scientific concepts in children 
K Lovell 
 - 
 - University of London Press Ltd., London  1965 
 - 158 p 
 - .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  LOV-G