1. D.P. Agrawal & Lalit Tiwari, India Was the First to Smelt Zinc by Distillation Process,
   http://www.infinityfoundation.com/mandala/t_es/t_es_agraw_zinc.htm 4/10/2008 (Link)

2. Mark Aldenderfer, Nathan M. Craig, Robert J. Speakman, and Rachel Popelka-Filcoff, Four-thousand-year-old gold artifacts from the Lake Titicaca basin, southern Peru, 5002–5005 | PNAS|April 1, 2008|vol.105| no. 13.         www.pnas.org/cgi/doi/10.1073/pnas.0710937105 (Link)

3. An Illustrated History of Metallurgy, The Seven Metals of Antiquity, Metals in Ancient Civilizations, Many historical facts, sometimes  obscure, can found on stamps, IIM Bulletin, Vol.98, p63-66, June - July 2005 (Link)

4.  "Aranmula Metal Mirror" Metallurgical Heritage of Kerala, Metal News, 22(2), 2004. (link)

5.  The Enigmatic Mirror from of Aranmula, Kerala (Link)

6.  S.C.K.Pillai, R.M.Pillai and A.D. Damodaran, Analyzing a Mysterious Alloy,  1992, JOM (Link)

7. A History of Iron, http://www.geocities.com/Duncanjberry/history.html (2003)(link)

8. Jeyaraj, V., Technology of bronze casting as revealed from Ancient Metallic Antiquities, p.96-102 (link)

9. Jeyaraj, V., Non-destructive analysis of South Indian Panams, Journal of Numismatic Society of India, 1981,    Vol.XLIII, Part 3, p132-135 (link)

10. John D. Verhoeven,  The Mystery of Damascus blades, Scientific American, 2001, p62-65 (link)

11. Paper on “Metallographical Investigations of Iron objects in Ancient Vidharbha region of Maharashtra” by P.P Deshpande and N.B. Dhokey. (Link)

Iron Pillar

1. D.P. Agrawal. Review: Delhi Iron Pillar: New Insights. Balasubramaniam, R. 2002. [Online] Available
    http://www.infinityfoundation.com/mandala/t_rv/t_rv_agraw_delhi.htm
2. Dr. R. Balasubramaniam. The Corrosion Resistant Delhi Iron Pillar [Online] Available http://www.iitk.ac.in/infocell/Archive/dirnov1/iron_pillar.html
3. Delhi Iron Pillar [Online] Available http://www.corrosion-doctors.org/Landmarks/ Pillar.htm
4. Shrink Fitting [Online] Available http://www.ameritherm.com/overview_ shrinkfit.html
5. Prominent Armenians In The History Of India [Online] Available http://www.menq.am/history/chap2_part04.htm
6. Paper Computer simulation studies on Delhi Iron Pillar : Estimation of weight by A.P. Kulkarni and P.P Deshpande (link)