Columbia subject headings:
Covenants (Law)--Congresses.
Cultural property--Protection--Congresses.
Historic preservation--Alberta--Congresses.
Historic preservation--Congresses.
Harvard subject headings:
Calgary (Alta.)--Buildings, structures, etc.
Covenants (Law)--Canada--Congresses.
Covenants (Law)--Congresses.
Cultural property--Protection--Alberta--Calgary--Congresses.
Cultural property--Protection--Congresses
Historic preservation--Alberta--Calgary--Congresses.
Historic preservation--Congresses
Princeton subject headings: