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~ Grassy Butte SW ND topo map, 1:24000 scale, 7.5 X 7.5 Minute, Current, 2014
~ Grassy Butte SW ND topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2011
~ Grassy Butte SW ND topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1974, updated 1977
~ Grassy Butte SW ND topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1997, updated 2001