Columbia subject headings:
Africa--Audio-visual aids--Catalogs.
Africa--Bibliography.
Africa--Societies, etc.--Directories.
Harvard subject headings:
Africa--Audio-visual aids--Catalogs.
Africa--Bibliography.
Africa--Societies, etc.--Directories.
Princeton subject headings:
Africa--Audio-visual aids--Catalogs.
Africa--Bibliography.
Africa--Societies, etc.--Directories.