Fundamentals and elements of electricity 
Cardenas, Elpidio J. 
 -  National Book Store, Inc.  1989 
 - xi, 141 pages. 
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<br/><br/><label>ISBN: </label>9-71084609-4 
<br/><br/><label>Dewey Class. No.: </label>F 621.394 C17f 1989