Colorado: A Historical, Descriptive and Statistical Work on the Rocky ...    by Frank Fossett   1878

Early Records of Gilpin County, Colorado, 1859-1861    by Thomas Maitland Marshall   Arc

Equal Suffrage : The Results of an Investigation League in Colorado Made For the Collegiate Equal Suffrage League of New York State    by Helen L. Sumner   Goo     LC

History of Colorado.    by Wilbur Fiske Stone    S.J Clarke Publishing Co. 1918    Goo  vol 1   vol 2     vol 3   vol 4   

The History of Equal Suffrage in Colorado, 1868-1898 , by Joseph G. Brown    LC

History of Nevada, Colorado, and Wyoming, 1540-1888.     by Hubert Howe Bancroft, Frances Fuller Victor. 1890    Goo     1887     1890

History of the State of Colorado, Embracing Accounts of the Pre-historic ...‎     by Frank Hall, Rocky Mountain Historical Company    1890    Goo

The Indian War of 1864, Being a Fragment of the early History of Kansas, Nebraska, Colorado & Wyoming     by Eugene Ware, 1911   KC

Official Information: Colorado , by Colorado Board of Immigration   1872   MoA       DBI

Portrait and biographical record of the state of Colorado     Chapman publishing company, 1899   OpL

Quarto-centennial Celebration, University of Colorado, November 13,14 and 15 ...  by University of Colorado, University of Colorado – 1902    Goo

Report on the Colorado strike     by U. S. Commission on Industrial Relations, George P. West - Coal Miners' Strike,  1913-1914 – 1915    Goo

The Union Colony at Greeley, Colorado, 1869-1871   by James F Willard. 1918   Goo  

Year book of the State of Colorado [1920 through 1927; land use & settlement; Statistics]   Colorado Bd of Immigration, 1918-1950   Har

The Young Engineers in Colorado: or, At Railwood Building in Earnest ,     by H. Irving Hancock    Gut