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2. Markose, P. M., Raghavayya, M. and Iyenger, M. A. R. (1980) Estimation of radium-226 by emanometry, Bulletin of Radiation Protection, 3, No. 4
3. Raghavayya, M., Khan, A. H. and Srivastava, G. K., Exhalation of Rn-222 from soil, some aspects of variations. Unpublished