Piaget, Jean, 1896-  Piaget, Jean, 1896- <br/><br/>
The child's conception of number / 
[translated by C. Gattegno and F.M. Hodgson]. 
 - London :  Routledge & Paul,  [1964] 
 - International library of psychology, philosophy, and scientific method .
<br/><br/> Translation of La genese du nombre chez l'enfant. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child study.<br/>Number concept.