Columbia subject headings:
Waqf--Economic aspects.
Waqf--Islamic countries.
Harvard subject headings:
Islam--Charities--History.
Islamic countries--Economic conditions.
Waqf--Islamic countries--Economic conditions.
Waqf--Islamic countries--History.
Princeton subject headings:
Islam--Charities--History.
Islamic countries--Economic conditions.
Waqf--Islamic countries--Economic conditions.
Waqf--Islamic countries--History.