1983The Lexicological and Lexicographical Methods and Procedures of John Wilkins and William Lloyd. Ph.D. dissertation, Univ. of Illinois at Urbana-Champaign.
1977 “John Wilkins’ Theory of Meaning and the Development of a Semantic Model”. Cahiers linguistiques d’Ottawa 91:41–61. (Repr. in John Wilkins and 17th-Century British Linguistics ed. by J. L. Subbiondo, 291–308. Amsterdam & Philadelphia: John Benjamins 1992.)