An American national standard  : IEEE recommended practice for industrial and commercial power systems analysis 
/ Institute of electrical and electronics engineers 
. - New York  : IEEE : ANSI, 1980
. - 224 p.  : ill.  ; 26 cm. 
 - The IEEE color book series .
<br/><br/>Bibliogr., index 
<br/><br/><label>ISBN: </label>0471092622 
<br/><br/><label>Source: </label> Don 
<br/><br/><label>Universal Decimal Class. No.: </label>621.3