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Pranab K. Chattopadhyay (b. 1945) is an Archaeometallurgist. He has voluntarily retired as Manager, Training, Alloy Steels Plant, Steel Authority of India Limited, Durgapur. He held the post of Senior Fellow, Centre for Archaeological Studies & Training, Eastern India from August 2001 to December 2010. He worked on the Harikela coins at the British Museum, London, with AZ Chand Award in October 2000. He is the author of Archaeometallurgy in India: Studies on Technoculture in Early Copper and Iron Ages in Bihar, Jharkhand and West Bengal (2004); Metalcrafts of Eastern India and Bangladesh (2004). He co-authored History of Metals: in Eastern India and Bangladesh in 2010. He has conducted research projects funded by Indian National Science Academy, New Delhi. He is visiting faculty at the Institute of Archaeology, ASI, New Delhi. He has around 115 published papers in national & international journals.

Dr. Sudipta Bhattacharyya is Reader at the Department of Economics and Politics, Visva-Bharati University, Santiniketan. Previously he was a lecturer at Vidyasagar University, Midnapore, where the blueprint of this book was prepared. He studied B. Sc and M. Sc in Economics at the Calcutta University, Kolkata and obtained M. Phil and Ph. D from the Jawaharlal Nehru University, New Delhi. Dr. Bhattacharyya visited Queen Elizabeth House, Oxford University as a South Asian Visiting Scholar during 1997-98. He has contributed many papers in national and international journals. He is the co-editor of Development Alternatives : Theories and Evidence.(Allied Publisher, Delhi).