Columbia subject headings:
Public opinion--United States--History--20th century.
Social surveys--United States--History--20th century.
United States--Race relations--Public opinion--History--20th century.
Harvard subject headings:
African Americans--Attitudes--History--20th century.
Public opinion--United States--History--20th century
Social surveys--United States--History--20th century.
United States--Race relations--Public opinion--History--20th century.
White people--United States--Attitudes--History--20th century.
Princeton subject headings:
Public opinion--United States--History--20th century.
Social surveys--United States--History--20th century.
United States--Race relations--Public opinion--History--20th century.