Columbia subject headings:
Harvard subject headings:
Amazon River.
Brazil--Description and travel.
French Guiana--Description and travel.
Río de la Plata (Argentina and Uruguay)
South America--Description and travel.
Princeton subject headings:
Amazon River--Description and travel.
Brazil--Description and travel.
French Guiana--Description and travel.
Río de la Plata (Argentina and Uruguay)
South America--Description and travel.