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Stars and Sextants, 1904; Star Distance Tables for Facilitating the use of Lord Ellenborough's Method of Correcting the Centring and Total Errors of Sextants at Sea
Stars and Sextants, 1904; Star Distance Tables for Facilitating the use of Lord Ellenborough's Method of Correcting the Centring and Total Errors of Sextants at Sea
John Abner Sprigge