Mulder, H. (1936). Cognition and volition in language. PhD Thesis, Wolters Uitgevers-Maatschappij, Groningen. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Mulder, H. (1936). Cognition and volition in language. PhD Thesis, Wolters Uitgevers-Maatschappij, Groningen. [FULLTEXT]