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1989. United States Geological Survey. A scanned USGS 1:24,000 topographic map. United States Geological Survey.
1957. United States Geological Survey. A scanned USGS 1:24,000 topographic map. United States Geological Survey.
1958. United States Geological Survey. A scanned USGS 1:24,000 topographic map. United States Geological Survey.
1957. United States Geological Survey. A scanned USGS 1:24,000 topographic map. United States Geological Survey.