44 maps
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USGS historical 15-minute topo (1918)
USGS historical 15-minute topo (1919)
USGS historical 15-minute topo (1912)
USGS historical 15-minute topo (1953)
USGS historical 15-minute topo (1910)
USGS historical 15-minute topo (1955)
USGS historical 15-minute topo (1939)
USGS historical 15-minute topo (1913)
USGS historical 15-minute topo (1951)
USGS historical 15-minute topo (1941)
USGS historical 15-minute topo (1952)
USGS historical 15-minute topo (1911)
USGS historical 15-minute topo (1957)