Columbia subject headings:
Africa--Archival resources--Congresses.
Africa--Archival resources--Great Britain--Congresses.
Africa--Library resources--Congresses.
Africa--Library resources--Great Britain--Congresses.
Africa--Study and teaching--Great Britain--Congresses.
Harvard subject headings:
Africa--Archival resources--Congresses.
Africa--Archival resources--Great Britain--Congresses.
Africa--Library resources--Congresses.
Africa--Library resources--Great Britain--Congresses.
Africa--Study and teaching--Great Britain--Congresses.
Princeton subject headings:
Africa--Archival resources--Great Britain--Congresses.
Africa--Library resources--Great Britain--Congresses.
Africa--Study and teaching--Great Britain--Congresses.