Penfold, R. A. <br/><br/>
Electronic security devices 

 - London  Babani  1979 
 - 102 p 
<br/><br/><label>ISBN: </label>9780900162763 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electronic Engineering
<br/><br/><label>LC Class. No.: </label>621.38928 PEN 1979 
<br/><br/><label>Dewey Class. No.: </label>621.38928 PEN 1979 
<br/><br/><label>National Library of Medicine Call No.: </label>621.38928 PEN 1979