Columbia subject headings:
Harvard subject headings:
Bermuda Triangle.
Mahdism.
Mahdī, Muḥammad ibn al-Ḥasan, 869-
Shipwrecks--Bermuda Triangle.
Princeton subject headings:
Bermuda Triangle.
Mahdism.
Mahdī, Muḥammad ibn al-Ḥasan, 869-
Shipwrecks--Bermuda Triangle.