Smith, M. E. (1935). A study of the speech of eight bilingual children of the same family. Child Development, 6, 19-25. doi:10.2307/1125553. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Smith, M. E. (1935). A study of the speech of eight bilingual children of the same family. Child Development, 6, 19-25. doi:10.2307/1125553. [FULLTEXT]