Wortman, Leon A. <br/><br/>
Closed circuit television handbook/ 
Leon A. Wortman 
 - Slough :  W. Foulsham   1964 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Closed Circuit
<br/><br/><label>Dewey Class. No.: </label>621.38802  / WOR