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Summary
DescriptionMagneticdeclination.jpg
Diagram showing the pattern of magnetic declination in the United States.
{{Information |Description = Diagram showing the pattern of magnetic declination in the United States. |Source = http://education.usgs.gov/common/lessons/how_to_use_a_compass_with_a_usgs_topographic_map.html }} Category:Navigational aids [[Category: