Columbia subject headings:
Environmental policy--Europe, Central.
Environmental policy--Europe, Eastern.
Environmental protection--Europe, Central.
Environmental protection--Europe, Eastern.
Harvard subject headings:
Environmental management--Europe, Central.
Environmental management--Europe, Eastern.
Environmental policy--Europe, Central
Environmental policy--Europe, Eastern
Princeton subject headings:
Environmental management--Europe, Central.
Environmental management--Europe, Eastern.
Environmental policy--Europe, Central.
Environmental policy--Europe, Eastern.