Columbia subject headings:
Harvard subject headings:
Argentina--Boundaries--Uruguay--Congresses.
Argentina--Foreign relations--Uruguay--Congresses.
Bridges--Argentina--Congresses.
Bridges--Uruguay--Congresses.
Uruguay--Boundaries--Argentina--Congresses.
Uruguay--Foreign relations--Argentina--Congresses.
Princeton subject headings:
Argentina--Boundaries--Uruguay--Congresses.
Argentina--Relations--Uruguay--Congresses.
Bridges--Argentina--Congresses.
Bridges--Uruguay--Congresses.
Uruguay--Boundaries--Argentina--Congresses.
Uruguay--Relations--Argentina--Congresses.