Oliver, Frank J. <br/><br/>
Practical relay circuits/ 
Frank J. Oliver 
 - Johannesburg:  Pitman Pub,  1973 
 - xii, 363p.:  ill.;  22 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>027331808X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric relays<br/>Electric circuit--breakers<br/>Relay control systems<br/>Electric switchgear
<br/><br/><label>Dewey Class. No.: </label>621.317