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Principal facts of the earth's magnetism and methods of determining the true meridian and the magnetic declination.

APA Citation

U.S. Coast and Geodetic Survey. (1909). Principal facts of the earth's magnetism and methods of determining the true meridian and the magnetic declination. Washington: Govt. print. off..

MLA Citation

U.S. Coast and Geodetic Survey. Principal Facts of the Earth's Magnetism And Methods of Determining the True Meridian And the Magnetic Declination. Washington: Govt. print. off., 1909.

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