Terrestrial Magnetism. Distribution of Magnetic Declination in the United States for January 1, 1905, With Isogonic Chart And Secular Change Tables
Terrestrial Magnetism. Distribution of Magnetic Declination in the United States for January 1, 1905, With Isogonic Chart And Secular Change Tables
Book digitized by Google from the library of the University of Michigan and uploaded to the Internet Archive by user tpb.
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