Piaget, Jean <br/><br/>
Possibility and necessity  vol.2  the role of necessity in cognitive development 

 - Minneapolis  University of Minnesota  1987 
 - vii, 149p. 
<br/><br/><label>ISBN: </label>9780816613724 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CHILD PSYCHOLOGY
<br/><br/><label>Dewey Class. No.: </label>155.413  / P31