Columbia subject headings:
Architecture--Alberta--Calgary--History--20th century.
Architecture--Alberta--Calgary.
Calgary (Alta.)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Alberta--Calgary--History--20th century.
Architecture--Alberta--Calgary.
Calgary (Alta.)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Modern--20th century--Alberta--Calgary.
Architecture--Alberta--Calgary.
Calgary (Alta.)--Buildings.