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W. H. Simms

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The Sextant and Its Applications Including the Correction of Observations for Instrumental Errors, and the Determination of Latitude, Time and Longitude by Various Methods On Land and at Sea, With Examples and Tables
The Sextant and Its Applications Including the Correction of Observations for Instrumental Errors, and the Determination of Latitude, Time and Longitude by Various Methods On Land and at Sea, With Examples and Tables
The Sextant and Its Applications Including the Correction of Observations for Instrumental Errors, and the Determination of Latitude, Time and Longit