Columbia subject headings:
City and town life--Colorado--History.
Colorado--History, Local.
Extinct cities--Colorado--History.
Harvard subject headings:
City and town life--Colorado--History.
Colorado--History, Local.
Extinct cities--Colorado--History.
Ghost towns--Colorado--History.
Princeton subject headings:
City and town life--Colorado--History.
Colorado--History, Local.
Extinct cities--Colorado--History.