1. Human memory: a proposed system and its control processes;Atkinson,1968
2. Input modality and the serial position curve in short-term memory;Conrad;Psychonomic Science,1968
3. Two components in free recall;Craik;Journal of Verbal Learning and Verbal Behavior,1968
4. Precategorical acoustic storage (PAS);Crowder;Perception and Psychophysics,1969
5. Two storage mechanisms in free recall;Glanzer;Journal of Verbal Learning and Verbal Behavior,1966