Columbia subject headings:
City planning--England--London.
City planning--France--Paris.
City planning--Germany--Ruhr (Region)
City planning--Netherlands--Randstad.
Regional planning--Europe.
Harvard subject headings:
City planning--Europe
Regional planning--Europe.
Princeton subject headings:
City planning--England--London.
City planning--France--Paris.
City planning--Germany (West)--Ruhr River Region.
City planning--Netherlands--Randstad.
Regional planning--Europe.