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2. Clinical Neuro-ophthalmology;Walsh,1969
3. Clinical and psychological effects of marijuana in man;Weil;Science,1968
4. Effects of delta-9-trans tetrahydrocannabinol in man;Isbell;Psychopharmacologia,1967
5. Narcotics and Dangerous Drugs. Los Angeles Police Training Manual, 1970, p. 67.