Columbia subject headings:
Botany, Economic--Egypt--Periodicals.
Botany, Economic--Periodicals.
Botany--Egypt--Periodicals.
Botany--Periodicals.
Harvard subject headings:
Princeton subject headings:
Botany, Economic--Egypt--Periodicals.
Botany, Economic--Periodicals.
Botany--Egypt--Periodicals.
Botany--Periodicals.
Periodicals.