Columbia subject headings:
Conservation of natural resources--Law and legislation--Europe.
Conservation of natural resources--Law and legislation.
Land use--Law and legislation--Europe.
Land use--Law and legislation.
Regional planning--Law and legislation--Europe.
Regional planning--Law and legislation.
Harvard subject headings:
Conservation of natural resources--Law and legislation--Europe.
Conservation of natural resources--Law and legislation.
Land use--Law and legislation
Land use--Law and legislation--Europe.
Regional planning--Law and legislation--Europe.
Regional planning--Law and legislation.
Princeton subject headings: