Columbia subject headings:
Environmental management--Periodicals.
Environmental policy--International cooperation--Periodicals.
Environmental protection--Political aspects--Periodicals.
Harvard subject headings:
Environmental management--Periodicals
Environmental policy--International cooperation--Periodicals
Environmental protection--Political aspects--Periodicals.
Princeton subject headings:
Environmental management--Periodicals.
Environmental policy--International cooperation--Periodicals.
Environmental protection--Political aspects--Periodicals.
Periodicals.