Piaget, Jean <br/><br/>
The Child's Conception Of number / 
Jean Piaget,  
 - 3rd ed. 
 - London :  Routledge & Kegan Paul Ltd,  1965. 
 - 248 p. :  22 cm. 
<br/><br/>Includes Index 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number Conception Children
<br/><br/><label>Dewey Class. No.: </label>155.41323  / PIA 1965