Columbia subject headings:
United States--Description and travel.
United States--Rural conditions.
United States--Social conditions--1933-1945.
Working class--United States.
Harvard subject headings:
United States--Description and travel.
United States--Rural conditions.
United States--Social conditions--1933-1945.
Working class--United States
Princeton subject headings:
United States--Description and travel.
United States--Rural conditions.
United States--Social conditions--1933-1945.
Working class--United States.