Columbia subject headings:
Harvard subject headings:
Holdt, Jacob--Exhibitions.
Holdt, Jacob--Travel--United States.
Poverty--United States--Pictorial works.
Race relations--United States--History--20th century--Pictorial works.
United States--Social conditions--1960-1980.
United States--Social life and customs--1971-
Princeton subject headings:
Holdt, Jacob--Exhibitions.
United States--Social conditions--1960-1980--Pictorial works--Exhibitions.
United States--Social life and customs--1971---Pictorial works--Exhibitions.