HALLIDAY, A M Methyl phenidate in parkinsonism. [electronic resource] - British medical journal Jun 1961 - 1652-5 p. digital Publication Type: Journal Article ISSN: 0007-1447 Standard No.: 10.1136/bmj.1.5240.1652 doi Subjects--Topical Terms: Parkinson Disease--therapyParkinsonian Disorders