Wellman, Frederick Edward. <br/><br/>
The protective gear handbook / 
F.E. Wellman. 
 - 2nd ed. / 
 - London :   Pitman,   1968. 
 - xi, 379 p. :   ill., plates, forms. ;   23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0273436554 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Protective relays.<br/> Electric switchgear.
<br/><br/><label>Dewey Class. No.: </label>621.3178