Columbia subject headings:
Congo (Democratic Republic)--Economic conditions.
Congo (Democratic Republic)--Politics and government.
Yombe (Congolese and Angolan people)--Congo (Democratic Republic)--History.
Yombe (Congolese and Angolan people)--Economic conditions.
Yombe (Congolese and Angolan people)--Social life and customs.
Harvard subject headings:
Congo (Democratic Republic)--Economic conditions
Congo (Democratic Republic)--Politics and government
Yombe (Congolese and Angolan people)--Economic conditions.
Yombe (Congolese and Angolan people)--History.
Yombe (Congolese and Angolan people)--Social life and customs.
Princeton subject headings:
Congo (Democratic Republic)--Economic conditions.
Congo (Democratic Republic)--Politics and government.
Yombe (Congolese and Angolan people)--Congo (Democratic Republic)--History.
Yombe (Congolese and Angolan people)--Economic conditions.
Yombe (Congolese and Angolan people)--Social life and customs.