Columbia subject headings:
Perkins County (S.D.)
Southwest Water Authority (N.D.)
Water-supply, Rural--South Dakota--Perkins County.
Watershed management--South Dakota--Perkins County.
Harvard subject headings:
Perkins County (S.D.)
Southwest Water Authority (N.D.)
Water-supply, Rural--South Dakota--Perkins County.
Watershed management--South Dakota--Perkins County--Finance.
Watershed management--South Dakota--Perkins County.
Princeton subject headings: