Columbia subject headings:
Harvard subject headings:
Cuba--Foreign relations--United States--Congresses.
Environmental policy
Environmental policy--International cooperation
United States--Foreign relations--Cuba--Congresses.
Princeton subject headings:
Cuba--Foreign relations--United States--Congresses.
Environmental policy--Cuba--Congresses.
Environmental policy--International cooperation--Congresses.
Environmental policy--United States--Congresses.
United States--Foreign relations--Cuba--Congresses.