Columbia subject headings:
Great Britain--Race relations--History--20th century.
Institute of Race Relations--History.
Race relations--History--20th century.
United States--Race relations--History--20th century.
Harvard subject headings:
Great Britain--Race relations--History--20th century.
Institute of Race Relations--History.
Race relations--History--20th century.
United States--Race relations--History--20th century.
Princeton subject headings:
Great Britain--Race relations--History--20th century.
Institute of Race Relations--History.
Race relations--History--20th century.
United States--Race relations--History--20th century.