33 maps
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USGS historical 15-minute topo (1905)
USGS historical 15-minute topo (1915)
USGS historical 15-minute topo (1894)
USGS historical 15-minute topo (1954)
USGS historical 15-minute topo (1916)
USGS historical 15-minute topo (1906)
USGS historical 15-minute topo (1924)
USGS historical 15-minute topo (1940)