1. Ternary and quaternary deductive terms for Nelson algebras

   • M. Spinks

   Original Paper Pages: 125 - 136

2. On weak lattice and frame homomorphisms

   • Bernhard Banaschewski
   • Aleš Pultr

   Original Paper Pages: 137 - 151

3. Containment for c, s, t operators on a binary relation

   • Frank D. Farmer

   Original Paper Pages: 153 - 175

4. Varieties of two-dimensional cylindric algebras II

   • Nick Bezhanishvili

   Original Paper Pages: 177 - 206

5. Compact factor congruences imply Boolean factor congruences

   • Diego J. Vaggione
   • Pedro Sánchez Terraf

   Original Paper Pages: 207 - 213

6. A categorical characterization of varieties

   • J. Adámek

   Original Paper Pages: 215 - 234

7. Clones containing all almost unary functions

   • Michael Pinsker

   Original Paper Pages: 235 - 255

8. Endomorphisms of relatively free algebras with weak exchange properties

   • John Fountain
   • Victoria Gould

   Original Paper Pages: 257 - 285

9. On Flat Semimodules over Semirings

   • Yefim Katsov

   Original Paper Pages: 287 - 299