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Raman, K. V., "Some Ancient Crafts and Technology in Tamilnad as Revealed in Excavations", Proceedings of the Second International Conference Seminar of Tamil Studies - Volume Two : Second International Conference Seminar of Tamil Studies, Madras, India, 3 - 10 January 1968. Edited by Asher, R. E., International Association of Tamil Research - Madras, October 1971, 394-401.
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