00386nam a2200097Ia 450000500170000000800410001705000240005824501000008226000700018265000360025220251229084833.0251229s9999    xx            000 0 und d  aTK 5101 .A1N38 1980 0aNational  telecommunications  conference 1980b Shambok Hilton Hotel November20th December 4th.  aNew Yorkb Institute of Electrical and Eletronics Engineersc1980  a1. Telecommunication Conference