Columbia subject headings:
Ecology--Congresses.
Ecology--Great Britain--Congresses.
Landscape architecture--Congresses.
Landscape architecture--Great Britain--Congresses.
Landscape protection--Congresses.
Landscape protection--Great Britain--Congresses.
Urban ecology (Biology)--Congresses.
Urban ecology (Biology)--Great Britain--Congresses.
Harvard subject headings:
Ecology--Congresses
Ecology--Great Britain--Congresses.
Landscape architecture--Congresses
Landscape architecture--Great Britain--Congresses.
Landscape ecology--Congresses.
Landscape ecology--Great Britain--Congresses.
Landscape protection--Congresses.
Landscape protection--Great Britain--Congresses.
Urban ecology (Biology)--Congresses.
Urban ecology (Biology)--Great Britain--Congresses.
Princeton subject headings:
Ecology--Congresses.
Ecology--Great Britain--Congresses.
Landscape architecture--Congresses.
Landscape architecture--Great Britain--Congresses.
Landscape protection--Congresses.
Landscape protection--Great Britain--Congresses.
Urban ecology (Biology)--Congresses.
Urban ecology (Biology)--Great Britain--Congresses.