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3. B.L. Simpson, Development of the Metal Casting Industry (American Foundrymen’s Assoc, Chicago, 1948)
4. B. Ravi, Metal Casting: Computer-Aided Design and Analysis (1st ed.), PHI, (2005) ISBN 81-203-2726-8
5. D.W. Anthony (ed.), The Lost World of Old Europe: The Danube Valley, 5000–3500 BC (Princeton Univ. Press, 2010)