Columbia subject headings:
Harvard subject headings:
Bass, William G., 1900-
Grand Canyon Region (Ariz.)--Biography.
Grand Canyon Region (Ariz.)--Social life and customs.
Tourism--Arizona--Grand Canyon Region--History--20th century.
Princeton subject headings:
Bass, William G., 1900-1981.
Grand Canyon Region (Ariz.)--Biography.
Grand Canyon Region (Ariz.)--Social life and customs.
Tourism--Arizona--Grand Canyon Region--History--20th century.