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H. S. Blackburne

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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.

by H. S. Blackburne First published in 1911 1 edition in 1 language — 1 previewable

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Created April 15, 2010
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