The Netherlands Society for Systems Research was founded on 9 May 1970 to promote interdisciplinary scientific activity on basis of a systems approach. It has its seat in Utrecht, The Netherlands. Officers for the year 1978: President: G. Broekstra, Graduate School of Management, Delft. Secretary: N. J. T. A. Kramer, Department of Industrial Engineering, Eindhoven University of Technology, Postbus 513, 5600 MB Eindhoven. Treasurer: J. N. Herbschleb, University of Utrecht. All information about the society can be obtained from the secretary. The editor ADDRESSES OF AUTHORS ~owakowaka, Maria, Institute of Praxiology, Polish Academy of Sciences, Warsa, Poland Van der Doef, P. , Institute for Developmental Psychology, Catholic Uni- versity Nijmegen, Erasmuslaan 16, 6525 GG Nijmegen, The Netherlands Kickert, W. J. M. , Department of Industrial Engineering, Technological University of Eindhoven, P. O. Box 513, 5600 MB Eindhoven, The Nether- lands Naerssen, R. F. van, Psychology Department, University of Amsterdam, The Netherlands Sijbrand, J. , Mathematical Institute, University of Utrecht, The Netherlands Vries, R. P. , de, Nieuwekade 17, Utrecht, The Netherlands Hezewijk, R. van, Institute of Criminology, Catholic University of Nijmegen, Oranjesingel 72, 6511 NZ nijmegen, The Netherlands Janssen, T.
M. V. , Mathematical Centre, 2e Boerhaavestraat 49, 1091 AL Amsterdam, The Netherlands CONTENTS Nowakowska, Maria: On the logical structure of the development of a scientific domain...1 Doef, P. van der: Psychotherapy as a problem of designing control in self-organizing and game-playing systems...27 Kickert, Walter J. M.