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Dyfyniad Arddull ChicagoInternational Affairs Bureau. Public Telecommunications Law. Tokyo: Nippon Telegraph & Telephone Public Corporation, 1972.
Dyfyniad MLAInternational Affairs Bureau. Public Telecommunications Law. Tokyo: Nippon Telegraph & Telephone Public Corporation, 1972.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.