Columbia subject headings:
Environmental protection--Dictionaries.
Land use--Planning--Dictionaries.
Municipal engineering--Dictionaries.
Regional planning--Dictionaries.
Harvard subject headings:
Environmental management--Dictionaries.
Environmental protection--Dictionaries
Land use--Planning--Dictionaries.
Municipal engineering--Dictionaries.
Regional planning--Dictionaries.
Princeton subject headings:
Dictionaries.
Environmental protection--Dictionaries.
Land use--Planning--Dictionaries.
Municipal engineering--Dictionaries.
Regional planning--Dictionaries.