Columbia subject headings:
Landscape architecture--United States--History--20th century.
New Deal, 1933-1939.
United States--Social conditions--1933-1945.
Harvard subject headings:
Landscape architecture--United States--History--20th century.
New Deal, 1933-1939.
United States--Social conditions--1933-1945.
Princeton subject headings:
Landscape architecture--United States--History--20th century.
New Deal, 1933-1939.
United States--Social conditions--1933-1945.