Norman, Thomas L. <br/><br/>
Electronic access control / 
Thomas L. Norman 
 - Waltham, Mass. :  Butterworth-Heinemann,  2012 
 - xix, 423 p. :  ill. ;  24 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9780123820280 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic security systems