Gayford, M. L. <br/><br/>
Modern relay techniques 
M. L. Gayford. 
 - London  Butterworths  c1969. 
 - vii, 149 p., 12 plates.  ill., form.  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>73484876 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric relays.