Columbia subject headings:
South Africa--Social conditions--Congresses.
Working class--South Africa--Congresses.
Harvard subject headings:
Social classes--South Africa--Congresses.
Social conflict--South Africa--Congresses.
South Africa--Economic conditions--Congresses.
South Africa--Politics and government--Congresses.
South Africa--Social conditions--Congresses.
Princeton subject headings:
Social classes--South Africa--Congresses.
Social conflict--South Africa--Congresses.
South Africa--Economic conditions--Congresses.
South Africa--Politics and government--Congresses.
South Africa--Social conditions--Congresses.