Piaget, Jean <br/><br/>
Child's conception of physical causality 

 - London  Routledge and Kegan Paul ltd.  1970 
 - viii,309p.; 22cm. 
<br/><br/><label>ISBN: </label>710061196 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child psychology<br/>Explanation of machines<br/>Explanation of movement