Columbia subject headings:
Harvard subject headings:
Amazon River.
Brazil--Boundaries--French Guiana.
Brazil--Foreign relations--France.
France--Foreign relations--Brazil.
French Guiana--Boundaries--Brazil.
Princeton subject headings:
Amazon River.
Brazil--Boundaries--French Guiana.
Brazil--Foreign relations--France.
France--Foreign relations--Brazil.
French Guiana--Boundaries--Brazil.