68356912
9781019026588
Blackburne, Harold S. is the author of '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. : Also Other Useful Navigational Tables, with Numerous Examples of Double Altitude', published 2022 under ISBN 9781019026588 and ISBN 1019026588.
[read more]