Columbia subject headings:
Botany, Experimental--Periodicals.
Botany--Periodicals.
Plant physiology--Periodicals.
Harvard subject headings:
Botany, Experimental--Periodicals.
Botany--Periodicals
Plant physiology--Periodicals
Princeton subject headings:
Botany, Experimental--Periodicals.
Botany--Periodicals.
Periodicals.
Plant physiology--Periodicals.