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USGS topo, 2023
USGS historical 15-minute topo (1921)
USGS historical 15-minute topo (1950)
USGS historical 15-minute topo (1948)
USGS historical 15-minute topo (1957)
USGS historical 15-minute topo (1965)
USGS historical 15-minute topo (1938)