43 maps
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USGS historical 15-minute topo (1917)
USGS historical 15-minute topo (1918)
USGS historical 15-minute topo (1959)
USGS historical 15-minute topo (1919)
USGS historical 15-minute topo (1943)
USGS historical 15-minute topo (1948)
USGS historical 15-minute topo (1941)
USGS historical 15-minute topo (1953)
USGS historical 15-minute topo (1937)
USGS historical 15-minute topo (1955)