United States. Hydrographic Office. (1902). Azimuth tables, giving true bearings of sun at intervals of 10 minutes between sunrise and sunset for parallels of latitude between 40 degrees N and 50 degrees N, inclusive. GPO.
Chicago Style (17th ed.) CitationUnited States. Hydrographic Office. Azimuth Tables, Giving True Bearings of Sun at Intervals of 10 Minutes Between Sunrise and Sunset for Parallels of Latitude Between 40 Degrees N and 50 Degrees N, Inclusive. [Washington]: GPO, 1902.
MLA (9th ed.) CitationUnited States. Hydrographic Office. Azimuth Tables, Giving True Bearings of Sun at Intervals of 10 Minutes Between Sunrise and Sunset for Parallels of Latitude Between 40 Degrees N and 50 Degrees N, Inclusive. GPO, 1902.
Warning: These citations may not always be 100% accurate.