Columbia subject headings:
Africa, North--Bibliography.
Middle East--Bibliography.
Reference books--Africa, North.
Reference books--Middle East.
Harvard subject headings:
Africa, North--Bibliography.
Africa, North--Reference books--Bibliography.
Africa, North--Reference books.
Middle East--Bibliography.
Middle East--Reference books--Bibliography.
Middle East--Reference books.
Princeton subject headings:
Africa, North--Bibliography.
Middle East--Bibliography.
Reference books--Africa, North.
Reference books--Middle East.