1. Semilattices with closure

   • Marcel Jackson

   Original paper Pages: 1 - 37

2. Topological representation for implication algebras

   • Manuel Abad
   • J. Patricio Díaz Varela
   • Antoni Torrens

   Original paper Pages: 39 - 48

3. Orthomodular lattices from 3-dimensional quadratic spaces

   • J. C. Carréga
   • R. Mayet

   Original paper Pages: 49 - 88

4. Special reflexive graphs in modular varieties

   • Marino Gran
   • Jiří Rosický

   Original paper Pages: 89 - 102

5. On the atomic conditions of lattice-ordered groups

   • Xinmin Lu
   • Zhinan Qi

   Original paper Pages: 103 - 115