United States. Hydrographic Office. (1930). Radio aids to navigation, including details of radio-compass stations, radiobeacons, weather bulletins, storm and navigational warnings, time signals, et cetera. GPO.
Chicago Style (17th ed.) CitationUnited States. Hydrographic Office. Radio Aids to Navigation, Including Details of Radio-compass Stations, Radiobeacons, Weather Bulletins, Storm and Navigational Warnings, Time Signals, Et Cetera. [Washington]: GPO, 1930.
MLA (9th ed.) CitationUnited States. Hydrographic Office. Radio Aids to Navigation, Including Details of Radio-compass Stations, Radiobeacons, Weather Bulletins, Storm and Navigational Warnings, Time Signals, Et Cetera. GPO, 1930.
Warning: These citations may not always be 100% accurate.