பேச்சு:தமிழர் உலோகத் தொழில்நுட்பம்

"The village of Swamimalai, which I visited in 2003 and 2005, offers a unique opportunity to explore the relationship between material culture, social organization and exchange as this is one of the few places in the world which preserves the lost-wax method of metal production that was perfected around 1000 AD during the Chola Empire."

http://archaeology.blogsome.com/2007/03/30/ethnoarchaeology-in-india/