http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Admiralty list of radio signals Volume 6, part 5 NP 286 (5)
Pilot services, Vessel traffic services and port operations Americas and Antarctica
xxii, 316 páginas : ilustraciones ; 30 cm.
Stations: Service Details -- Table of Transmitting Frequencies in the 156-174 MHz band -- the IMO Standard Ship Reporting System -- Phonetic Alphabet and Figure Code