Columbia subject headings:
Estes Park (Colo.)
Rocky Mountains.
West (U.S.)--Description and travel.
Harvard subject headings:
Bird, Isabella L. (Isabella Lucy), 1831-1904
Estes Park (Colo.)
Frontier and pioneer life--Rocky Mountains.
Rocky Mountains.
West (U.S.)--Description and travel.
Women--Rocky Mountains--Biography.
Princeton subject headings:
Estes Park (Colo.)
Rocky Mountains.
West (U.S.)--Description and travel.