Columbia subject headings:
Water and civilization--Congresses.
Water use--Congresses.
Water--Folklore--Congresses.
Harvard subject headings:
Applied anthropology--Congresses.
Human beings--Effect of environment on--Congresses
Water and civilization--Congresses.
Water use--Congresses.
Water--Environmental aspects--Congresses.
Water--Folklore--Congresses.
Water-supply--Congresses
Princeton subject headings:
Water and civilization--Congresses.
Water use--Congresses.
Water--Folklore--Congresses.