1. The role of forecast in planning

   • Mario Bunge

   OriginalPaper Pages: 207 - 221

2. Problems of points of inflection in trend functions as described by a model for the forecast of brand shares

   • Werner Kroeber-Riel
   • Sighard Roloff

   OriginalPaper Pages: 222 - 230

3. Invariant structures of prognosis curves in Forrester's World Dynamics

   • Helmut Maier
   • Werner Hugger

   OriginalPaper Pages: 231 - 261

4. Epidemical spread of scientific objects: An attempt of empirical approach to some problems of meta-science

   • Maria Nowakowska

   OriginalPaper Pages: 262 - 297

5. Comments on Dr. Vetter's paper ‘deontic logic without deontic operators’

   • Herbert Keuth

   Discussion Pages: 298 - 310

6. Bemerkungen Zu J. Rödig's ‘Kritik des normlogischen schliessens’

   • Ota Weinberger

   Discussion Pages: 311 - 317

7. Reviews

   • Ekkart Zimmermann
   • K. B. Madsen

   BookReview Pages: 318 - 321

8. Erratum

   Erratum Pages: 322 - 322