Gibbins, E.H.H. <br/><br/>
An introduction to electrical drawing; part - II 

 - London  Blackie & Son  1963 
 - 63 p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electric currents--Grounding
<br/><br/><label>Dewey Class. No.: </label>621.313  / G438