Columbia subject headings:
Harvard subject headings:
Conservation of natural resources--Ecuador.
Environmental policy--Ecuador
Water quality management--Ecuador.
Water--Pollution--Economic aspects--Ecuador.
Water--Pollution--Law and legislation--Ecuador.
Princeton subject headings:
Conservation of natural resources--Ecuador.
Environmental policy--Ecuador.
Water quality management--Ecuador.
Water--Pollution--Ecuador.
Water--Pollution--Law and legislation--Ecuador.