Piaget, Jean <br/><br/>
The language and thought of the child 

 - 3rd ed. 
 - London  Routledge and Kegan Paul ltd  1959 
 - xxii, 286 p.; 22cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Children- Language<br/>Children vocabulary<br/>Verbal exchange