Hughlings Jackson, J. (1874). On the nature of the duality of the brain. Medical Press and Circular, 1, 80-86. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Hughlings Jackson, J. (1874). On the nature of the duality of the brain. Medical Press and Circular, 1, 80-86. [FULLTEXT]