Sprague De Camp, L. (1946). Learning to talk. American Speech, 21, 23-28. doi:10.2307/487346. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Sprague De Camp, L. (1946). Learning to talk. American Speech, 21, 23-28. doi:10.2307/487346. [FULLTEXT]