Humphreys, M. (1880). A contribution to infantile linguistic. Transactions of the American Philosophical Association, 11, 2-17. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Humphreys, M. (1880). A contribution to infantile linguistic. Transactions of the American Philosophical Association, 11, 2-17. [FULLTEXT]