Codding, George Arthur
The future of satellite communications
Westview Press, 1990
Buku Teks
Smith, Delbert D.
Teleservice satellite : experiments and future perspectices
Sijthoff and Noordhoff, 1978
Buku Teks
Trends in marketing services
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Linfield, Robert F.
Telecommunications: present status and future trends
Noyes Data, 1995
Buku Teks
Future trends in Indonesian mineral exploration
Artikel Jurnal