Columbia subject headings:
Harvard subject headings:
Federal Writers' Project.
O'Gara, Geoffrey--Journeys--United States.
O'Gara, Geoffrey--Travel--United States.
United States--Description and travel.
United States--Social life and customs--1918-1945.
Princeton subject headings:
Federal Writers' Project.
O'Gara, Geoffrey--Travel--United States.
United States--Description and travel.
United States--Social life and customs--1918-1945.