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~ Signal Hill TX topo map, 1:24000 scale, 7.5 X 7.5 Minute, 2016
~ Signal Hill TX topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2010
~ Signal Hill TX topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2013
~ Signal Hill TX topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1986, updated 1995
~ Signal Hill TX topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1968, updated 1983
~ Signal Hill TX topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1968, updated 1971
~ Signal Hill TX topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1986, updated 1986
~ Signal Hill TX topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1968, updated 1974