Jones, K. (1968). General systems theory: A model for a planning information system. Oslo: Forskningsveien.
Παραπομπή Chicago StyleJones, Ken. General Systems Theory: A Model for a Planning Information System. Oslo: Forskningsveien, 1968.
Παραπομπή MLAJones, Ken. General Systems Theory: A Model for a Planning Information System. Oslo: Forskningsveien, 1968.
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