Ackerman, Paul R. <br/><br/>
Signals: what your Child is really telling you 

 - 1st ed. 
 - Newyork  Dial press  1997 
 - 290 
<br/><br/><label>ISBN: </label>9780803781511 
<br/><br/><label>Dewey Class. No.: </label>301.427 ACK