Columbia subject headings:
Water and civilization--History--To 1500.
Water use--Spain--History--To 1500.
Water--Economic aspects--Spain--History--To 1500.
Water--Social aspects--Spain--History--To 1500.
Water--Spain--History--To 1500.
Water-supply engineering--Spain--To 1500.
Water-supply--Spain--History--To 1500.
Harvard subject headings:
Water and civilization--History--To 1500.
Water use--Spain--History--To 1500.
Water--Economic aspects--Spain--History--To 1500.
Water--Social aspects--Spain--History--To 1500.
Water--Spain--History--To 1500.
Water-supply engineering--Spain--To 1500.
Water-supply--Spain--History--To 1500.
Princeton subject headings:
Water and civilization--History--To 1500.
Water use--Spain--History--To 1500.
Water--Economic aspects--Spain--History--To 1500.
Water--Social aspects--Spain--History--To 1500.
Water--Spain--History--To 1500.
Water-supply engineering--Spain--To 1500.
Water-supply--Spain--History--To 1500.