- The Animas City story ;: A forerunner of Durango, Colorado by Retha Beebe Luzar, 1978
- Gold Rush Days Victor Colorado City of Gold Mines by Victor Chamber of Commerce, 1990
- City and County of Denver Colorado:Building Zone Ordinance and Zone Map and Amendment to the City Charter Adopted May 15, 1923 by Colorado) (City of Denver, 1923
- A city gone smart: Boulder, Colorado is the first to employ the smart grid citywide.(CURRENTS): An article from: E by Michael Prager, 2010-07-01
- Marble, Colorado: City of Stone
- Uranium mining in Colorado: Pitchblende, Central City, Colorado, Uranium, Colorado, Clear Creek County, Colorado, Tertiary
- Polk Colorado Springs, Colorado, City Directory 1986. Including Broadmoor, Cragmor, Fountain, Ivywild, Manitou Springs, Security Village, Skyway Park, Stratmoor Hills, Stratton Meadows and Widefield.
- The Ordinances of the City of Colorado Springs, Colorado 1900 by W.S. (Ed. ) Morris, 1900
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- Frommers Comprehensive Travel Guide: Denver, Boulder & Colorado Springs (Frommer's City Guides) by Don Laine, Barbara Laine, 1994-12
- National Register of Historic Places in Colorado: Central City, Colorado, Cripple Creek, Colorado, Gold Hill, Colorado, Crested Butte, Colorado
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