Columbia subject headings:
Draft animals--Egypt.
Harvard subject headings:
Camels--Egypt--History--To 1500--Sources.
Draft animals--Egypt--History--To 1500--Sources.
Mules--Egypt--History--To 1500--Sources.
Transportation--Egypt--History--To 1500--Sources.
Working animals--Egypt--History--To 1500--Sources.
Princeton subject headings:
Camels--History.
Mules--History.
Transportation--History.
Working animals--History.