Columbia subject headings:
Botany--Periodicals.
Phytogeography--Periodicals.
Plant communities--Periodicals.
Plant ecology--Periodicals.
Harvard subject headings:
Botany--Periodicals
Phytogeography--Periodicals.
Plant communities--Periodicals.
Plant ecology--Periodicals
Princeton subject headings:
Botany--Geographical distribution--Periodicals.
Botany--Periodicals.
Periodicals.
Phytogeography--Periodicals.
Plant communities--Periodicals.
Plant ecology--Periodicals.