Betriebliche Telefon- und ISDN-Anlagen rechtsgemäss gestaltet - Hammer, Volker; Pordesch, Ulrich; Rossnagel, Alexander (Berlin ; New York : Springer, 1993)
Includes bibliographical references (p. [235]-243) and index.
Keywords: Telecommunication and telecontrol -- Telegraphy, telephony, radio, television services