Columbia subject headings:
Harvard subject headings:
Arabian Peninsula--Civilization--Congresses.
Arabian Peninsula--History--Congresses.
Princeton subject headings:
Arabs--History--To 622--Congresses.
Civilization, Arab--Congresses.
Middle East--Antiquities--Congresses.
Middle East--Civilization--To 622--Congresses.
Middle East--History--To 622--Congresses.