Elgerd, Olle I. <br/><br/>
Electric energy systems theory  : an introduction 
/ Olle I. Elgerd,... 
. - 2e ed. 
. - Paris  : McGraw-Hill, 1982
. - XVIII-533 p.  ; 23 cm. 
 - McGraw-Hill series in electrical engineering .
<br/><br/><label>ISBN: </label>0070192308 
<br/><br/><label>Source: </label> Don 
<br/><br/><label>Universal Decimal Class. No.: </label>621.3