Columbia subject headings:
Arabian Peninsula--Emigration and immigration.
Islam.
Muslim pilgrims and pilgrimages--Saudi Arabia--Mecca.
Travelers--Arabian Peninsula.
Harvard subject headings:
Emigration and immigration--Religious aspects--Islam--Congresses.
Muslim pilgrims and pilgrimages--Congresses.
Travel--Religious aspects--Islam--Congresses.
Princeton subject headings:
Arabian Peninsula--Emigration and immigration.
Islam.
Muslim pilgrims and pilgrimages--Saudi Arabia--Mecca.
Travelers--Arabian Peninsula.