Columbia subject headings:
Droughts--United States--Congresses.
Municipal water supply--United States--Congresses.
Water conservation--United States--Congresses.
Water consumption--United States--Congresses.
Waterworks--Environmental aspects--United States--Congresses.
Harvard subject headings:
Princeton subject headings:
Droughts--United States--Congresses.
Water-supply--United States--Congresses.