@InProceedings{sowa:1979:ACL,
  author    = {John F. Sowa},
  title     = {Semantics of Conceptual Graphs},
  booktitle = {Proceedings of the 17th Annual Meeting of the Association for Computational Linguistics},
  month     = {June},
  year      = {1979},
  address   = {La Jolla, California, USA},
  publisher = {Association for Computational Linguistics},
  pages     = {39--44},
  url       = {http://www.aclweb.org/anthology/P79-1010},
  doi       = {10.3115/982163.982175}
}