Engebretson, David J. <br/><br/>
Guide to networking for physical security systems / 
by David J. Engebretson 
 - New York :  Cengage Learning ,  2008 
 - 275 p. :  ill. ;  24 cm. 
<br/><br/><label>ISBN: </label>9781418073961 1418073962 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic security systems<br/>Telecommunication systems