Columbia subject headings:
Animal introduction--Congresses.
Animal populations--Congresses.
Plant introduction--Congresses.
Plant populations--Congresses.
Harvard subject headings:
Animal introduction--Congresses.
Animal populations--Congresses.
Colonization (Ecology)--Congresses.
Plant introduction--Congresses.
Plant populations--Congresses.
Population biology--Congresses
Princeton subject headings:
Animal introduction--Congresses.
Animal populations--Congresses.
Plant introduction--Congresses.
Plant populations--Congresses.