Morris, D D Threshold for conditioned suppression using x-rays as the pre-aversive stimulus. [electronic resource] - Journal of the experimental analysis of behavior Jan 1966 - 29-34 p. digital Publication Type: Journal Article ISSN: 0022-5002 Standard No.: 10.1901/jeab.1966.9-29 doi Subjects--Topical Terms: AnimalsAvoidance LearningConditioning, PsychologicalExtinction, PsychologicalRadiation EffectsRadiometryRats