Columbia subject headings:
Chicago-Colorado Colony (Longmont, Colo.)
Colorado--History--Sources.
German Colonization Company (Colfax, Colo.)
Southwestern Colony (Green City, Colo.)
St. Louis-Western Colony (Evans, Colo.)
Harvard subject headings:
Agricultural colonies--Colorado--History.
Chicago-Colorado Colony (Longmont, Colo.)
Chicago-Colorado colony, Longmont, Col.
Collective settlements--Colorado--History.
Colorado--History--Sources.
Colorado--History--To 1876.
German Colonization Company (Colfax, Colo.)
German colonization company, Colfax, Col.
Southwestern Colony (Green City, Colo.)
Southwestern colony, Green City, Col.
St. Louis-Western Colony (Evans, Colo.)
St. Louis-western colony, Evans, Col.
Princeton subject headings:
Colorado--History--Sources.