Dale, Charles W. <br/><br/>
Practical applications of DC theory / 
Charles W. Dale, Ralph A. Oliva. 
 - 3rd ed. 
 -  1976. 
<br/><br/><label>ISBN: </label>0895120100 
<br/><br/><label>LC Class. No.: </label>TK1111  / Dal 1976