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Krishnaswamy, S. Y., "Major Irrigation Systems of Ancient Tamilnad", Proceedings of the First International Conference Seminar of Tamil Studies - Volume One : First International Conference Seminar of Tamil Studies, Kuala Lumpur, Malaysia, 16 - 23 April 1966. Edited by Thani Nayagam, Xavier S., International Association of Tamil Research, January 1968, 451-461.
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