Columbia subject headings:
Regional economics--Mathematical models.
Regional planning--Soviet Union--Mathematical models.
Soviet Union--Economic conditions--1975-1985--Mathematical models.
Harvard subject headings:
Regional economics--Mathematical models.
Regional planning--Soviet Union--Mathematical models.
Soviet Union--Economic conditions--1975-1985--Mathematical models.
Princeton subject headings:
Regional economics--Mathematical models.
Regional planning--Soviet Union--Mathematical models.
Soviet Union--Economic conditions--1976---Mathematical models.