Newman, S. N. (1931). Further experiments in phonetic symbolism. American Journal of Psychology, 45, 53-75. doi:10.2307/1414186. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Newman, S. N. (1931). Further experiments in phonetic symbolism. American Journal of Psychology, 45, 53-75. doi:10.2307/1414186. [FULLTEXT]