Leo G. Sands <br/><br/>
Electronic security systems / 

 - Indianapolis  Ind., T. Audel  1973 
<br/><br/>Scope and application of security systems (Page-7), Switches and relays (Page-15), Sensors and encoders (Page-41), Indicators and alarms (Page-98), Electrical control and alarm circuits (Page-117), Electronic control and alarm circuits (Page-133), Security communications (Page-145), Closed circuits television (Page-187), Transmission media (Page-213), Transmission system installation (Page-239). 
<br/><br/><label>ISBN: </label>0672232057 
<br/><br/><label>Subjects--Personal Names: </label><br/>Leo G. Sands
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic security systems
<br/><br/><label>Dewey Class. No.: </label>621.38928,SAN