1. Retrieval time from semantic memory
2. Collins, A. M. and M. R. Quillian, in press. Experiments on semantic memory and language comprehension. To appear in: L. W. Gregg (ed.), Cognition in learning and memory. New York: Wiley.
3. Conditioned reflexes;Pavlov,1927
4. Semantic memory;Quillian,1968