Incoming Resources
- Armstrong, Otis
- Land of contrast, a history of southeast Colorado, Frederic J. Athearn
- Blaik, Earl "Red"
- Bowlen, Pat
- Armour, Tommy III
- An isolated empire, a history of northwestern Colorado, by Frederic J. Athearn
- Armstrong, William L
- The new empire of the Rockies, a history of northeast Colorado, by Steven F. Mehls
- Berg, Alan
- The valley of opportunity, a history of West-Central Colorado, by Steven F. Mehls