Beck, Paul <br/><br/>
Secret code :  door alarm / 
written by Paul Beck 
 - 32 pages :  color illustrations ;  21 cm 
<br/><br/> Primary 
<br/><br/><label>ISBN: </label>0439781701 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Security systems<br/>Burglar alarms
<br/><br/><label>Dewey Class. No.: </label>621.38928