Howes, D. (1954). On the interpretation of word frequency as a variable affecting speed of recognition. Journal of Experimental Psychology, 48, 106-112. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Howes, D. (1954). On the interpretation of word frequency as a variable affecting speed of recognition. Journal of Experimental Psychology, 48, 106-112. [FULLTEXT]