Columbia subject headings:
Africa--Bibliography.
Dissertations, Academic--Canada--Bibliography.
Dissertations, Academic--United States--Bibliography.
Harvard subject headings:
Africa--Bibliography.
Dissertations, Academic--Canada--Bibliography.
Dissertations, Academic--United States--Bibliography.
Princeton subject headings:
Africa--Bibliography.
Dissertations, Academic--Canada--Bibliography.
Dissertations, Academic--United States--Bibliography.