1. Crisholm, R., Theory of Knowledge, Prentice-Hall, Englewood Cliffs, NJ, 1977.
2. Haack, S., Philosophy of Logics, Cambridge Univ. Press, 1978.
3. Hanfling, O., Logical Positivism, Basil Blackwell, Oxford, 1981.
4. Neuhold, E.J., and M. Schrefl, “Towards Databases for Knowledge Representation”, (in this volume).
5. Smith, J.M., “Large-Scale Knowledge Systems”, (in this volume).