International code of signals, 1969 : suitable for transmission by all means of communication coming into operation 1 April 1969
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Bibliographic Information
International code of signals, 1969 : suitable for transmission by all means of communication coming into operation 1 April 1969
H.M.S.O., 1969
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At head of title: Board of Trade
First issued in 1857 by Gt. Brit. Board of Trade, under title: Commercial code of signals
Includes indexes