Perin, D <br/><br/>
CESI AT-4444; EHVDC transmission systems-state of the art - Design of external insulation from the point of view of DC permanent voltage under polluted conditions Vol. 1.2/3.1 

 - Italy  CESI  1988 
 - 50p 
<br/><br/><label>Universal Decimal Class. No.: </label>621.315.024.027.3  / CEN.88;1