Columbia subject headings:
Harbors--Yemen (Republic)--Ḥaḍramawt (Province)--History.
Ḥaḍramawt (Yemen : Province)--History.
Harvard subject headings:
Princeton subject headings:
Harbors--Ḥaḍramawt (Yemen : Province)--History.
Ḥaḍramawt (Yemen : Province)--History.