Columbia subject headings:
Harvard subject headings:
Authors, Austrian--20th century--Journeys.
Gruber, Reinhard P. (Reinhard Peter), 1947---Journeys--United States.
United States--Description and travel.
Princeton subject headings:
Authors, Austrian--20th century--Travel.
Gruber, Reinhard P. (Reinhard Peter), 1947---Travel--United States.
United States--Description and travel.