Egan, J. P. (1948). Articulation testing methods. Laryngoscope, 58(9), 955-991. doi:10.1288/00005537-194809000-00002. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Egan, J. P. (1948). Articulation testing methods. Laryngoscope, 58(9), 955-991. doi:10.1288/00005537-194809000-00002. [FULLTEXT]