Columbia subject headings:
Metropolitan areas--Canada--Congresses.
Metropolitan areas--France--Congresses.
Metropolitan government--Canada--Congresses.
Metropolitan government--France--Congresses.
Harvard subject headings:
Metropolitan areas--Canada--Congresses.
Metropolitan areas--France--Congresses.
Urban policy--Social aspects--Canada--Congresses.
Urban policy--Social aspects--France--Congresses.
Princeton subject headings: