Colorado : Horace Trumbauer: eastern architecture in the mountain west

Author: Platt, Frederick, 1946-

Graybeard's Colorado, or, Notes on the centennial state : describing a trip from Philadelphia to Denver and back in the autumn and winter of 1881-82

Author: Graff, John Franklin, 1828-
Published 1882

Colorado : a guide to the highest state,

Published 1941

Official information, Colorado : a statement of facts prepared and published by authority of the Territorial Board of Immigration

Published 1872

Recollections of Colorado & California in 1872 : journal of a trip across America

Author: Redfield, John Howard, 1815-1895.
Published 2011

Industrial resources of western Kansas and eastern Colorado : Kansas Pacific Railway

Author: Elliott, Richard Smith, 1817-1890.
Published 1871