Columbia subject headings:
Harvard subject headings:
Deserts--Egypt--Social conditions.
Egypt--Economic conditions.
Oases--Egypt--Social conditions.
Princeton subject headings:
Baḥrīyah Oasis (Egypt)--Economic conditions.
Baḥrīyah Oasis (Egypt)--Social conditions.
Farafra Oasis (Egypt)--Economic conditions.
Farafra Oasis (Egypt)--Social conditions.