Columbia subject headings:
Automobile travel--United States--History--20th century.
Overland journeys to the Pacific.
Travelers--United States--Biography.
United States--Description and travel.
Harvard subject headings:
Automobile travel--United States--History--20th century.
Biographies
Overland journeys to the Pacific
Travelers--United States--Biography
United States--Description and travel
Princeton subject headings:
Automobile travel--United States--History--20th century.
Overland journeys to the Pacific.
Travelers--United States--Biography.
United States--Description and travel.