Columbia subject headings:
Harvard subject headings:
Rio Grande (Colo.-Mexico and Tex.)
Water resources development--Environmental aspects--Rio Grande.
Water--Pollution--Mexican-American Border Region.
Water--Pollution--Mexico.
Water--Pollution--Rio Grande.
Princeton subject headings:
Water quality management--Rio Grande Watershed.
Water resources development--Environmental aspects--Rio Grande.
Water--Pollution--Rio Grande Watershed.
Water-supply--Rio Grande Watershed.