[n] E. C. Budge, “Linear Light Link Data Transmission”, in Proc. PAC'69, Washington D.C., USA, Mar. 1969, pp. 903-905.
[n] E. C. Budge, “PCM Data Transimission System Using Split Phase Code”, in Proc. PAC'69, Washington D.C., USA, Mar. 1969, pp. 887-891.
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