Hammer, Volker <br/><br/>
Betriebliche Telefon- und ISDN-Anlagen rechtsgemäss gestaltet / 
V. Hammer, U. Pordesch, A. Rossnagel. 
 - Berlin ;  New York :  Springer,  1993. 
 - 254 p. :  ill. 
 - Edition SEL-Stiftung .
<br/><br/>Includes bibliographical references (p. [235]-243) and index. 
<br/><br/><label>ISBN: </label>9783540565116 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Telecommunication and telecontrol--Telegraphy, telephony, radio, television services