Columbia subject headings:
Africa, French-speaking Equatorial.
Chad--History.
Rabih, Sultan, -1900.
Harvard subject headings:
Africa, French-speaking Equatorial.
Chad--History
Rabah, Sultan, -1900.
Rabih, Sultan, -1900.
Princeton subject headings:
Africa, French-speaking Equatorial.
Chad--History.
Rabah Zobeir, d. 1900.