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Merta, F.S., Sanjana, M.K., Baretto, M.A., and Doctor, R.Relation of Betel Leaf Chewing to Periodontal Disease, J.A.D.A. , 50:531, 1955.
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Shourie, K.L. , and Soni, N.N.Studies of pH of Saliva, J. All India Dent. Assoc., 26:1, 1953.
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