(1981)Intelec 81 International Telecommunications energy conference Intelec 81 International Telecommunications energy conference Interlec 81 International Telecommunications energy conferendce Intelec'83 fifth International telecommunications energy conference (1984)International Telecommunications Energy Conference Intelec'83 fifth International telecommunciations energy conference (Munich)International Telecommunications Energy Conference (Wash.,D.C.)International Telecommunications Energy Conference International Telecommunications Energy Conference Intelec'83 fifth International telecommunications energy conference(5th,1983)