Brown's signalling : how to learn the commercial code and all other forms of signalling as required at B.O.T. examinations, to which is appended The British signal manual, comprising a complete signal book for small vessels : Marconi wireless telegraphy explained.
James Brown & Son (Glasgow, Scotland),publisher.
Great Britain.Admiralty.British signal manual.
Edition statement from front cover.
Includes The British signal manual, version first published in December 1912.
Signals and signalling.