- Computation of Language: An Essay on Syntax, Semantics and Pragmatics in Natural Man-Machine Communication
- Foundations of Computational Linguistics: Human-Computer Communication in Natural Language
- Foundations of Computational Linguistics: Human-Computer Communication in Natural Language
- A Computational Model of Natural Language Communication: Interpretation, Inference, and Production in Database Semantics
- Computational Linguistics and Talking Robots: Processing Content in Database Semantics