Columbia subject headings:
Brazil--Boundaries--French Guiana.
French Guiana--Boundaries--Brazil.
Oiapoque River (French Guiana and Brazil)--Description and travel.
Samson, Michel--Travel--Oiapoque River (French Guiana and Brazil)
Harvard subject headings:
Brazil--Boundaries--French Guiana.
French Guiana--Boundaries--Brazil.
Oiapoque River (French Guiana and Brazil)--Description and travel.
Samson, Michel--Travel--Oiapoque River (French Guiana and Brazil)
Princeton subject headings: