Columbia subject headings:
Harvard subject headings:
Phytogeography--Africa, Central--Periodicals.
Phytogeography--Europe--Periodicals.
Phytogeography--Periodicals.
Plants--Africa, Central--Classification--Periodicals.
Plants--Classification--Periodicals.
Plants--Europe--Classification--Periodicals.
Princeton subject headings:
Botany--Africa, Central--Classification--Periodicals.
Botany--Europe, Western--Classification--Periodicals.
Periodicals.
Phytogeography--Africa, Central--Periodicals.
Phytogeography--Europe, Western--Periodicals.
Phytogeography--Periodicals.
Plants--Classification--Periodicals.