Columbia subject headings:
Canada--Commerce--History--Sources--Bibliography--Catalogs.
Canada. Department of Trade and Commerce--Archives--Catalogs.
Public Archives Canada--Catalogs.
Harvard subject headings:
Canada--Commerce--History--Sources--Bibliography--Catalogs.
Canada. Department of Trade and Commerce--Archives--Catalogs.
Public Archives Canada--Catalogs.
Princeton subject headings:
Canada--Commerce--History--Sources--Bibliography--Catalogs.
Canada. Department of Trade and Commerce--Archives--Catalogs.
Public Archives Canada. Public Records Division--Catalogs.