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~ Thornton WY topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2012
~ Thornton WY topo map, 1:24000 scale, 7.5 X 7.5 Minute, 2015
~ Upton WY topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1957, updated 1959
~ Thornton WY topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1984, updated 1984