Piaget Jean <br/><br/>
Genetic epistermology. 
Piaget Jean 
 - Colambia  Colambia University Press       1970 
 - 84p  cm. 
<br/><br/><label>Standard No.: </label>48587 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>R2, L0