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Pillai, R.S. and Koshy, M. 1966. Estimation of an Apparently Sudden Population Build-Up in the Snail, Macrochlamys Indica Benson in Calcutta. Records of the Zoological Survey of India. 64, 1-4 (Dec. 1966), 169–172. DOI:https://doi.org/10.26515/rzsi/v64/i1-4/1966/161536.