DescriptionMagnetic Declination Map of Maryland Plate XVII WBClark 1897.jpg
English: Plate XVII of 1897 publication called Maryland Geological Survey Volume One, with caption "A map showing the lines of equal magnetic declination for Maryland in the years 1700 and 1800. By L. A. Bauer. Maryland Geological Survey, Wm. Bullock Clark, State Geologist, 1897." With Legend.
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(Original text: Original publication: Maryland Geological Survey Volume One, by W. B. Clark, 1897. Johns Hopkins University Press.
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{{Information |Description = Plate XVII of 1897 publication called Maryland Geological Survey Volume One, with caption "A map showing the lines of equal magnetic declination for Maryland in the years 1700 and 1800. By L. A. Bauer. Maryland Geological S...
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