@inproceedings{ijcai1975p19,
  title     = {Some Thoughts about Representing Knowledge in Instructional Systems},
  author    = {Laubsch, Joachim H.},
  booktitle = {Proceedings of the Fourth International Joint Conference on
               Artificial Intelligence, {IJCAI-75}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Patrick Winston and Carl Hewitt},
  pages     = {122--124},
  year      = {1975},
  note      = {Representation Of Problems and Knowledge},
  url       = {https://ijcai.org/proceedings/1975/19},
}