Columbia subject headings:
Hydrology--Río de la Plata Region (Argentina and Uruguay)
Maps.
Precipitation (Meteorology)--Río de la Plata Region (Argentina and Uruguay)--Charts, diagrams, etc.
Río de la Plata Region (Argentina and Uruguay)--Climate--Maps.
Water-supply--Río de la Plata Region (Argentina and Uruguay)--Maps.
Harvard subject headings:
Hydrology--Rio de la Plata Region (Argentina and Uruguay).
Precipitation (Meteorology)--Rio de la Plata Region--Charts, diagrams, etc.
Rio de la Plata region (Argentina and Uruguay)--Climate--Maps.
Water-supply--Rio de la Plata Region--Maps.
Princeton subject headings: