Columbia subject headings:
Dutton, Clarence E. (Clarence Edward), 1841-1912. Tertiary history of the Grand Canyon District.
Geology--Arizona--Grand Canyon.
Grand Canyon (Ariz.)--Description and travel.
Grand Canyon (Ariz.)--Historiography.
Grand Canyon (Ariz.)--History.
Natural history--Arizona--Grand Canyon--Historiography.
Harvard subject headings:
Dutton, Clarence E. (Clarence Edward), 1841-1912. Tertiary history of the Grand Canyon District.
Geology--Arizona--Grand Canyon.
Grand Canyon (Ariz.)--History.
Princeton subject headings:
Grand Canyon (Ariz.)
Grand Canyon (Ariz.)--Description and travel.