Wellman, B. L., Case, I. M., Mengert, I. G., & Bradbury, D. E. (1931). Speech sounds by young children. Iowa City: University of Iowa Press. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)
Wellman, B. L., Case, I. M., Mengert, I. G., & Bradbury, D. E. (1931). Speech sounds by young children. Iowa City: University of Iowa Press. [FULLTEXT]