Gayford, M.L. <br/><br/>
Modern relay techniques 

 - London  Butterworths  1969 
 - vi, 149 p.- 
 - STC monograpy : No.1 .
<br/><br/><label>ISBN: </label>244713 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electromechanics
<br/><br/><label>Dewey Class. No.: </label>621  / GAY