Pinard Adrien <br/><br/>
Conservation of conservation: The child's acquisition of a fundamental concept 

 - Chicago, USA  The University of Chicago Press   1981 
 - xii,199p 
<br/><br/><label>ISBN: </label>0-226-66834-7 
<br/><br/><label>Source: </label>Textual 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child psychology