National Archives – Rocky Mountain Region (Denver)

Colorado, Montana, New Mexico, North Dakota, South Dakota, Utah, Wyoming

Rocky Mountain Online Archives

Colorado State Archives Historical Records Index

Colorado State Archives Online Indexes

Colorado State Library

Colorado Historical Society (History Colorado)

Colorado Railroad Museum

Colorado School of Mines

USGS Library

Colorado Council of Genealogical Societies

Colorado Genealogical Society

Denver Public Library:  Western History and Genealogy

University of Denver Penrose Library

University of Denver Penrose Library – Special Collections

Aurora Genealogical Society

Boulder Genealogical Society

Colorado Society of Hispanic Genealogy

Columbine Genealogical and Historical Society

Foothills Genealogical Society

Larimer County Genealogical Society

Longmont Genealogical Society

Pike’s Peak Genealogical Society

Weld County Genealogical Society

Bessemer Historical Society – Steelworks Museum

Heritage West

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