82 maps
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USGS historical 15-minute topo (1943)
USGS historical 15-minute topo (1944)
USGS historical 15-minute topo (1920)
USGS historical 15-minute topo (1923)
USGS historical 15-minute topo (1918)
USGS historical 15-minute topo (1942)
USGS historical 15-minute topo (1955)
USGS historical 15-minute topo (1917)
USGS historical 15-minute topo (1922)
USGS historical 15-minute topo (1937)
USGS historical 15-minute topo (1948)
USGS historical 15-minute topo (1940)