Title: Tables for azimuths, great-circle sailing, and reduction to the meridian, with a new and improved "Sumner" method: latitudes 85⁰ N. to 85⁰ S., declinations 85⁰ N. to 85⁰ S. : also other useful navigational tables, with numerous examples of double altitudes, equal altitudes, azimuths, etc. /
Authors: Blackburne, Harold S.; Westland, Charles.
Publisher: By authority: John Mackay,
Year: 1908
Subjects: Navigation Tables; Azimuth Tables.; Great-circle sailing.; Sumner's method.