Columbia subject headings:
Najrān (Saudi Arabia)--History.
Najrān (Saudi Arabia)--Social life and customs.
Harvard subject headings:
Najrān (Saudi Arabia)--History.
Najrān (Saudi Arabia)--Social conditions.
Najrān (Saudi Arabia)--Social life and customs.
Princeton subject headings:
Najrān (Saudi Arabia)--History.
Najrān (Saudi Arabia)--Social life and customs.