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245 00 Elements of the system dynamics method.
260 Cambridge, Mass. :|bProductivity Press,|c1980.
300 320p.
650 0 System analysis|vCongresses.
650 0 Social sciences|xMathematical models|vCongresses.
700 1 Randers, Jorgen.
711 2 International Conference on System Dynamics|d(1976 :
|cGeilo, Norway)
|