105 maps
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USGS historical 15-minute topo (1945)
USGS historical 15-minute topo (1944)
USGS historical 15-minute topo (1931)
USGS historical 15-minute topo (1950)
USGS historical 15-minute topo (1951)
USGS historical 15-minute topo (1942)
USGS historical 15-minute topo (1947)
USGS historical 15-minute topo (1936)
USGS historical 15-minute topo (1961)