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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.

Harold S. Blackburne

其他書名	Also Other Useful Navigational Tables, with Numerous Examples of Double Altitudes, Equal Altitudes, Azimuths, Etc
出版	By authority: John Mackay, 1908
URL	http://books.google.com.hk/books?id=xHEDAAAAYAAJ&hl=&source=gbs_api