1. Cohen, B. H., Bousfield, W. A., & Whitmarsh, G. A. Cultural norms for verbal items in 43 categories. Technical Report No. 22, 1957, University of Connecticut, Contract Nonr 631(00), Office of Naval Research.
2. Retrieval time from semantic memory;Collins;Journal of Verbal Learning and Verbal Behavior,1969
3. Does category size affect categorization time?;Collins;Journal of Verbal Learning and Verbal Behavior,1970
4. The retrieval of words from long-term memory;Freedman;Journal of Verbal Learning and Verbal Behavior,1971
5. A word count of spoken English;Howes;Journal of Verbal Learning and Verbal Behavior,1966