Broadbent, D. E. (1952). Listening to one of two synchronous messages. Journal of Experimental Psychology, 44(1), 51-55. doi:10.1037/h0056491. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Broadbent, D. E. (1952). Listening to one of two synchronous messages. Journal of Experimental Psychology, 44(1), 51-55. doi:10.1037/h0056491. [FULLTEXT]