Columbia subject headings:
Choice of transportation--Mathematical models--Congresses.
Consumers' preferences--Mathematical models--Congresses.
Housing--Location--Mathematical models--Congresses.
Harvard subject headings:
Choice of transportation--Mathematical models--Congresses.
Consumers' preferences--Mathematical models--Congresses.
Housing--Location--Mathematical models--Congresses.
Princeton subject headings:
Regional economics--Mathematical models.
Regional planning--Mathematical models.