Columbia subject headings:
Coal mines and mining--Colorado--Crested Butte--History.
Crested Butte (Colo.)--Description and travel.
Crested Butte (Colo.)--History.
Harvard subject headings:
Coal mines and mining--Colorado--Crested Butte--History.
Crested Butte (Colo.)--Description and travel.
Crested Butte (Colo.)--History.
Princeton subject headings:
Coal mines and mining--Colorado--Crested Butte--History.
Crested Butte (Colo.)--Description.
Crested Butte (Colo.)--History.