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- [4] STIMULUS GENERALIZATION IN RETARDATES AS A FUNCTION OF VERBAL REINFORCEMENT SCHEDULE AND MENTAL AGE CANADIAN PSYCHOLOGIST-PSYCHOLOGIE CANADIENNE, 1968, 9 (02): : 293 - &
- [9] REINFORCEMENT EFFECTS OF FOOD AND STIMULUS NOVELTY PSYCHOLOGICAL RECORD, 1968, 18 (02): : 253 - &