Ohio Londonville Quadrangle Surveyed in 1912 in Cooperation with the State of Ohio

By: Contributor(s): Material type: MapMapPublication details: Washington US Geological Survey 1914Description: 1 Map Coloured 52 X 42 cmGenre/Form: DDC classification:
  • 912.771
Summary: Datum is mean sea levelSummary: Approximate mean declination 1912
Item type: Maps
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Datum is mean sea level

Approximate mean declination 1912