Gumhalter, Hans. <br/><br/>
Power supply systems in communications engineering / 
by Hans Gumhalter. 
 - (Munich) :  Siemens Aktiengesellschaft,  1984. 
 - 230 p.  :  ill. ;  20 cm. 
<br/><br/>Includes index. 
<br/><br/>Contents : pt. 1. Principles. 
<br/><br/><label>ISBN: </label>047190290X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication systems--Power supply.