Columbia subject headings:
Harvard subject headings:
Authors--Travel--Rio de la Plata (Argentina and Uruguay)
Rio de la Plata River Valley (Argentina and Uruguay)--Description and travel.
Rio de la Plata River Valley (Argentina and Uruguay)--Discovery and exploration--Sources.
Río de la Plata (Argentina and Uruguay)--Description and travel.
Travelers--Argentina.
Travelers--Rio de la Plata (Argentina and Uruguay)
Travelers--South America.
Princeton subject headings:
Rio de la Plata River Valley (Argentina and Uruguay)--Discovery and exploration--Sources.
Río de la Plata River Valley (Argentina and Uruguay)--Description and travel.