Columbia subject headings:
Landscape assessment--Canada--Congresses.
Landscape assessment--Congresses.
Landscape assessment--United States--Congresses.
Nature (Aesthetics)--Congresses.
Harvard subject headings:
Land use.
Landscape assessment--Canada--Congresses.
Landscape assessment--Congresses.
Landscape assessment--United States--Congresses.
Nature (Aesthetics)--Congresses
Princeton subject headings: