Columbia subject headings:
Harvard subject headings:
Chiapas (Mexico)--Environmental conditions--History.
Sanitary engineering--Mexico--Chiapas--History.
Water quality--Mexico--Chiapas--History.
Water-supply--Mexico--Chiapas--History.
Princeton subject headings:
Municipal water supply--Mexico--Chiapas--History--19th century.
Municipal water supply--Mexico--Chiapas--History--20th century.
Municipal water supply--Social aspects--Mexico--Chiapas.