Communiqués par Harold S. Blackburne

Cover for Harold S. Blackburne · Tables for Azimuths, Great-Circle Sailing, and Reduction to the Meridian, with a New and Improved Sumner Method : Latitudes 900 N. to 900 S. , Declinations 900 N. to 900 S. (Book) (2022)
Book
Tables for Azimuths, Great-Circl...
Harold S. Blackburne