Thorndike, E. L. (1937). On the number of words of any given frequency of use. Psychological Record, 1, 399-406. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Thorndike, E. L. (1937). On the number of words of any given frequency of use. Psychological Record, 1, 399-406. [FULLTEXT]