W. A. Coates & Pearch <br/><br/>
The Switch Gear Hand Book Vol 1 Apparatus 

 -  George Newnes Ltd London  1939 
 - 190 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrical Engineering
<br/><br/><label>Dewey Class. No.: </label>621.317  / COA