Columbia subject headings:
Water resources development--Government policy--Mexico--History.
Water use--Government policy--Mexico--History.
Water-supply--Government policy--Mexico--History.
Harvard subject headings:
Water resources development--Government policy--Mexico--History.
Water use--Government policy--Mexico--History.
Water-supply--Government policy--Mexico--History.
Princeton subject headings:
Water resources development--Government policy--Mexico--History.
Water use--Government policy--Mexico--History.
Water-supply--Government policy--Mexico--History.