Columbia subject headings:
Labor unions--South Africa--History.
South Africa--History--1836-1909.
South Africa--History--1909-1961.
South Africa--Race relations.
Harvard subject headings:
Labor unions--South Africa--History.
South Africa--History--1836-1909.
South Africa--History--1909-1961.
South Africa--Race relations.
Princeton subject headings:
Labor unions--South Africa--History.
South Africa--History--1836-1909.
South Africa--History--1909-1961.
South Africa--Race relations.