Columbia subject headings:
Architecture--Canada--History--20th century--Exhibitions.
Architecture--Competitions--Ontario--History--20th century--Exhibitions.
City planning--Competitions--Ontario--History--20th century--Exhibitions.
Toronto (Ont.)--Buildings, structures, etc.--20th century--Exhibitions.
Toronto City Hall (Toronto, Ont.)--History--Exhibitions.
Harvard subject headings:
Architecture, Modern--20th century--Designs and plans--Exhibitions.
Architecture--Canada--History--20th century--Exhibitions.
Architecture--Competitions--Ontario--Toronto--Exhibitions.
City halls--Ontario--Toronto--Designs and plans--Exhibitions.
City planning--Competitions--Ontario--Toronto--Exhibitions.
Toronto (Ont.)--Buildings, structures, etc.--Designs and plans--Exhibitions.
Princeton subject headings:
Architecture, Modern--20th century--Designs and plans--Exhibitions.
Architecture--Canada--History--20th century--Exhibitions.
Architecture--Competitions--Ontario--Toronto--Exhibitions.
City halls--Ontario--Toronto--Designs and plans--Exhibitions.
City planning--Competitions--Ontario--Toronto--Exhibitions.
Toronto (Ont.)--Buildings, structures, etc.--Designs and plans--Exhibitions.