Columbia subject headings:
Drug abuse--Egypt--19th century.
Drug addiction--Social aspects--Egypt--19th century.
Harvard subject headings:
Drug abuse--Egypt--History--19th century.
Drug traffic--Egypt--History--19th century.
Egypt--Social conditions--19th century.
Princeton subject headings:
Drug abuse--Egypt--History--19th century.
Drug traffic--Egypt--History--19th century.
Egypt--Social conditions--19th century.