@inproceedings{ijcai1971p17,
  title     = {A Programming Tool for Management of a Predicate-Calculus-Oriented Data Base},
  author    = {Sandewall, Erik},
  booktitle = {Proceedings of the Second International Joint Conference on
               Artificial Intelligence, {IJCAI-71}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {D.C. Cooper},
  pages     = {159--165},
  year      = {1971},
  url       = {https://ijcai.org/proceedings/1971/17},
}