114 maps
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USGS historical 15-minute topo (1943)
USGS historical 15-minute topo (1923)
USGS historical 15-minute topo (1941)
USGS historical 15-minute topo (1925)
USGS historical 15-minute topo (1926)
USGS historical 15-minute topo (1945)
USGS historical 15-minute topo (1939)
USGS historical 15-minute topo (1950)
USGS historical 15-minute topo (1924)
USGS historical 15-minute topo (1940)
USGS historical 15-minute topo (1904)
USGS historical 15-minute topo (1921)
USGS historical 15-minute topo (1917)