KENNARD, M A A longitudinal study of changes in EEG frequency pattern as related to psychological changes. [electronic resource] - The Journal of nervous and mental disease Jul 1956 - 8-20 p. digital Publication Type: Journal Article ISSN: 0022-3018 Standard No.: 10.1097/00005053-195607000-00002 doi Subjects--Topical Terms: ElectroencephalographyHumansLongitudinal StudiesMental Disorders--diagnosis