Klahr, David. <br/><br/>
Cognitive development an information processing view   
by David Klahr, J.G. Wallace 
 - New Jersey  Lawrence Erlbaum Associates  1976 
 - xii, 244p. 
<br/><br/><label>ISBN: </label>0470151285 
<br/><br/><label>Dewey Class. No.: </label>155.413  / N76