1. Finite structural axiomatization of every finite-valued propositional calculus

   • Zdzisław Dywan

   OriginalPaper Pages: 1 - 4

2. Equationally definable implication algebras for orthomodular lattices

   • G. N. Georgacarakos

   OriginalPaper Pages: 5 - 18

3. Reduced products of logical matrices

   • Janusz Czelakowski

   OriginalPaper Pages: 19 - 43

4. Three prepositional calculi of probability

   • Herman Dishkant

   OriginalPaper Pages: 49 - 61

5. On deontic logic

   • Leon Gumański

   OriginalPaper Pages: 63 - 75

6. The choice of logical foundations: Non-classical choices and the ultralogical choice

   • Richard Routley

   OriginalPaper Pages: 77 - 98

7. Fifth International Wittgenstein Symposium

   Announcement Pages: 99 - 99