PIAGET, Jean <br/><br/>
The child's construction of quantities / 
Jean Piaget and Barbel Inhelder 
 - London  Routledge and Kegan Paul  c1974 
 - vii, 285p.: 
<br/><br/> include index 
<br/><br/><label>ISBN: </label>0710078870 
<br/><br/><label>Dewey Class. No.: </label>160 PIA