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~ Keystone Dam OK topo map, 1:24000 scale, 7.5 X 7.5 Minute, 2016
~ Keystone Dam OK topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1958, updated 1959
~ Keystone Dam OK topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2010
~ Keystone Dam OK topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1958, updated 1968
~ Keystone Dam OK topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1958, updated 1977
~ Keystone Dam OK topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2012
~ Keystone Dam OK topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1958, updated 1983