Columbia subject headings:
Abd-el-Kerim I, Kolak of Wadai.
Ouaddaï (Chad)--History.
Ouaddaï (Chad)--Kings and rulers--Biography.
Harvard subject headings:
Abd-el-Kerim I, Kolak of Ouaddaï.
Abd-el-Kerim I, Kolak of Wadai.
Ouaddaï (Chad)--History.
Ouaddaï (Chad)--Kings and rulers--Biography.
Wadai (Sultanate)--History.
Wadai (Sultanate)--Kings and rulers--Biography.
Princeton subject headings:
Abd-el-Kerim I, Kolak of Ouaddaï.
Ouaddaï (Chad)--History.
Ouaddaï (Chad)--Kings and rulers--Biography.