Columbia subject headings:
City planning--History--Congresses.
Regional planning--History--Congresses.
Transportation and state--History--Congresses.
Urban transportation policy--History--Congresses.
Harvard subject headings:
City planning--History--Congresses.
Regional planning--History--Congresses.
Transportation and state--History--Congresses.
Urban transportation policy--History--Congresses.
Princeton subject headings:
City planning--History--Congresses.
Regional planning--History--Congresses.
Transportation and state--History--Congresses.
Urban transportation policy--History--Congresses.