McDonnell Douglas Electronic Systems Company: Description of the TexUS System as Used for MUC-4 Amnon Meyers author David de Hilster author 1992 text Fourth Message Understanding Conference (MUC-4): Proceedings of a Conference Held in McLean, Virginia, June 16-18, 1992 conference publication meyers-de-hilster-1992-mcdonnell-douglas https://aclanthology.org/M92-1029/ 1992