Brainerd, Charles J., <br/><br/>
The origins of the number concept 
Charles J. Brainerd 
 - New York  Praeger  1979 
 - xii, 227 p 25 cm 
<br/><br/>Bibliography: p. 222-227 
<br/><br/><label>ISBN: </label>0030293065 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number concept<br/>Cognition in children