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1892. United States. Geological Survey. This is a scanned historical map of the Gilead Quadrangle in Connecticut shown at a scale of 1:62,500. This map was created by the US Geological Su... US Geological Survey.
1892. United States. Geological Survey. This is a scanned historical map of the Gilead Quadrangle in Connecticut shown at a scale of 1:62,500. This map was created by the US Geological Su... US Geological Survey.
1892. United States. Geological Survey. This is a scanned historical map of the Gilead Quadrangle in Connecticut shown at a scale of 1:62,500. This map was created by the US Geological Su... US Geological Survey.
1892. United States. Geological Survey. This is a scanned historical map of the Gilead Quadrangle in Connecticut shown at a scale of 1:62,500. This map was created by the US Geological Su... US Geological Survey.