The Admiralty list of radio signals. 1. Coast radio stations, medical and quarantine services, general regulations, etc.
Bok Engelsk 1948
Utgitt | London : Hydrographic Department Admiralty , 1948
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Omfang | 1 b. (flere pag. )
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Utgitt | London : Hydrographic Department Admiralty , 1948
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Omfang | 1 b. (flere pag. )
|