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~ Bluegrass ND topo map, 1:24000 scale, 7.5 X 7.5 Minute, 2014
~ Bluegrass ND topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2011
~ Bluegrass ND topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1970, updated 1972