Columbia subject headings:
Waterworks--Environmental aspects--Mexico--Mexico City.
Waterworks--Mexico--Mexico City--History.
Waterworks--Social aspects--Mexico--Mexico City.
Harvard subject headings:
Environmental degradation--Mexico--Mexico City
Waterworks--Environmental aspects--Mexico--Mexico City.
Waterworks--Mexico--Mexico City--History.
Waterworks--Social aspects--Mexico--Mexico City.
Princeton subject headings: