70 maps
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USGS historical 15-minute topo (1942)
USGS historical 15-minute topo (1946)
USGS historical 15-minute topo (1939)
USGS historical 15-minute topo (1940)
USGS historical 15-minute topo (1925)
USGS historical 15-minute topo (1944)
USGS historical 15-minute topo (1922)
USGS historical 15-minute topo (1920)
USGS historical 15-minute topo (1927)
USGS historical 15-minute topo (1924)
USGS historical 15-minute topo (1947)
USGS historical 15-minute topo (1943)
USGS historical 15-minute topo (1951)
USGS historical 15-minute topo (1945)
USGS historical 15-minute topo (1921)
USGS historical 15-minute topo (1919)