Walker, Philip. <br/><br/>
Electronic security systems :  better ways to crime prevention / 
Philip Walker. 
 - 2nd ed. 
 - Oxford :  Butterworths,  1988. 
 - 287 p.  :  ill. ;  24 cm. 
<br/><br/> Includes index. 
<br/><br/><label>ISBN: </label>0408026359 (hbk. ) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic security systems.