130 maps
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USGS historical 15-minute topo (1950)
USGS historical 15-minute topo (1929)
USGS historical 15-minute topo (1962)
USGS historical 15-minute topo (1948)
USGS historical 15-minute topo (1961)
USGS historical 15-minute topo (1936)
USGS historical 15-minute topo (1949)