Jean Piaget and Barbel Inhelder <br/><br/>
The Psychology of the child 

 - Routledge & Kegan Paul, London  1969 
 - xivp 173 
<br/><br/><label>ISBN: </label>7100-6751-8 
<br/><br/><label>Dewey Class. No.: </label>136.7 Pia/Inh