1. Six problems of Gian-Carlo Rota in lattice theory and universal algebra

   • Joseph P. S. Kung
   • Catherine H. Yan

   Original Paper Pages: 113 - 127

2. Cube-like structures generated by filters

   • Colin G. Bailey
   • Joseph S. Oliveira

   Original Paper Pages: 129 - 158

3. Some remarks on projective-free rings

   • P. M. Cohn

   Original Paper Pages: 159 - 164

4. On the number of join-irreducibles in a congruence representation of a finite distributive lattice

   • G. Grätzer
   • F. Wehrung

   Original Paper Pages: 165 - 178

5. Results on undecidability of isomorphism of forms over polynomial rings

   • K. H. Kim
   • F. W. Roush

   Original Paper Pages: 179 - 189

6. Lattice ordered effect algebras

   • Scott R. Sykes

   Original Paper Pages: 191 - 199

7. Clutters and circuits III

   • Lorenzo Traldi

   Original Paper Pages: 201 - 209