Columbia subject headings:
Brazil--Boundaries--Peru.
Juruá River (Peru and Brazil)
Peru--Boundaries--Brazil.
Purus River (Peru and Brazil)
Harvard subject headings:
Brazil--Boundaries--Peru.
Jurua River.
Juruá River (Peru and Brazil)
Peru--Boundaries--Brazil.
Purus River (Peru and Brazil)
Purus River.
Princeton subject headings:
Brazil--Boundaries--Peru.
Jurua River.
Juruá River (Peru and Brazil)
Peru--Boundaries--Brazil.
Purus River (Peru and Brazil)
Purus River.