Ewa Zarkowska and John Clements <br/><br/>
Problem behaviour in people with severe learning disabilities : a practical guide to a constructional approach 

 - Croom Helm, London  1988 
 - xi,208p tabs,figs. 
<br/><br/><label>ISBN: </label>0-7099-3014-3 
<br/><br/><label>Dewey Class. No.: </label>371.917 Zar/Cle