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~ Kerby OR topo map, 1:125000 scale, 30 X 30 Minute, Historical, 1917, updated 1937
~ Kerby OR topo map, 1:125000 scale, 30 X 30 Minute, Historical, 1918, updated 1918
~ Kerby OR topo map, 1:125000 scale, 30 X 30 Minute, Historical, 1917, updated 1942
~ Kerby OR topo map, 1:125000 scale, 30 X 30 Minute, Historical, 1917, updated 1927