Columbia subject headings:
Environmental law--Europe--Criminal provisions--Congresses.
Environmental law--Europe--Criminal provisions.
Offenses against the environment--Europe--Congresses.
Offenses against the environment--Europe.
Harvard subject headings:
Environmental law--Europe--Criminal provisions--Congresses.
Offenses against the environment--Europe--Congresses.
Offenses against the environment--Law and legislation--Europe--Congresses.
Princeton subject headings:
Environmental law--Europe--Criminal provisions--Congresses.
Offenses against the environment--Europe--Congresses.