@inproceedings{ijcai1977p48,
  title     = {Vocabularies for Problem Solver State Descriptions},
  author    = {McDermott, Drew V.},
  booktitle = {Proceedings of the Fifth International Joint Conference on
               Artificial Intelligence, {IJCAI-77}},
  publisher = {International Joint Conferences on Artificial Intelligence},
  editor    = {Raj Reddy},
  pages     = {229--233},
  year      = {1977},
  note      = {Representation of Knowledge},
  url       = {https://ijcai.org/proceedings/1977/48},
}