Your search for ""usgsnw38.5-105.75"" revealed the following:

~ Cotopaxi CO topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1959, updated 1968

~ Cotopaxi CO topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1959, updated 1961

~ Cotopaxi CO topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1959, updated 1961

~ Cotopaxi CO topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1959, updated 1968

~ Cotopaxi CO topo map, 1:62500 scale, 15 X 15 Minute, Historical, 1959, updated 1977

~ Arkansas Mountain CO topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2013

~ Arkansas Mountain CO topo map, 1:24000 scale, 7.5 X 7.5 Minute, 2016

~ Arkansas Mountain CO topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 2010

~ Arkansas Mountain CO topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1980, updated 1985

~ Arkansas Mountain CO topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1980, updated 1981

~ Arkansas Mountain CO topo map, 1:24000 scale, 7.5 X 7.5 Minute, Historical, 1980, updated 1985