@inproceedings{ijcai1977p151,
  title     = {Model-Building in the Visions System},
  author    = {Williams, Thomas and Lowrance, John D. and Hanson, Allen R. and Riseman, Edward M.},
  booktitle = {Proceedings of the Fifth International Joint Conference on
               Artificial Intelligence, {IJCAI-77}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Raj Reddy},
  pages     = {644--644},
  year      = {1977},
  note      = {Vision},
  url       = {https://ijcai.org/proceedings/1977/151},
}