The essential Piaget 
/ edited by Howard E. Gruber and J. Jacques Voneche 
 - London  Routledge & K. Paul  1977 
 - xlii, 881 p. : ill. ; 25 cm. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 861-866. 
<br/><br/><label>ISBN: </label>0710087780 
<br/><br/><label>LCCN: </label>76-009337 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cognition in children<br/>Knowledge, Theory of--Collected works<br/>Biology--Collected works