Voyat, Gilbert <br/><br/>
Piaget systematized 
Gilbert E. Voyat ; with a foreword by Jean Piaget 
 - Hillsdale, N.J  L. Erlbaum Associates  c1982 
 - xvii, 214 p. : ill. ; 24 cm 
<br/><br/> Includes index. Bibliography: p. 201 
<br/><br/><label>ISBN: </label>9780898590265 
<br/><br/><label>ISSN: </label>81017283 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child Development<br/>Cognition in children<br/>Piaget, Jean, 1896-1980
<br/><br/><label>Dewey Class. No.: </label>155.4130924 VOY