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4. Veith I. The Yellow Emperor’s classic of internal medicine. Berkeley: University of California Press; 1970. p. 2–3. ISBN 0-520-01296-8, p.53, Ibid p 117, Ibid p 3, Ibid.
5. Mishra LC. Scientific basis for Ayurvedic therapies. Boca Raton: CRC Press; 2004. 0-8493-1366-X. Introduction.