Columbia subject headings:
Canada--Foreign relations--Congresses.
Canada--Politics and government--1945---Congresses.
Pressure groups--Canada--Congresses.
Harvard subject headings:
Canada--Foreign relations--Congresses.
Pressure groups--Canada--Congresses.
Princeton subject headings:
Canada--Foreign relations--Congresses.
Canada--Politics and government--1945---Congresses.
Pressure groups--Canada--Congresses.