Columbia subject headings:
Christianity--Middle East.
Müller, Caspar Detlef Gustav.
Nubia.
Harvard subject headings:
Christianity--Middle East.
Müller, Caspar Detlef Gustav--Bibliography.
Nubia
Princeton subject headings:
Christianity--Egypt.
Christianity--Nubia.
Müller, Caspar Detlef Gustav.
Nubia--History.