1. Abbasi, S. A., & Ramesh, N. (2002). Geothermal energy: Potential, recovery and environmental impacts. Journal of the Institution of Public Health Engineers, 1, 30–43.
2. Anonymous (1988). The world resources 1988–89. New York: Basic Books.
3. Anonymous (2003–2004). Ministry of Coal and Mines, Government of India, New Delhi.
4. Banerjee, S. P. (2004). Social dimensions of the mining sector. Journal of the Institution of Engineers (India), 85, 5–10.
5. Barney, G. O. (1980). The global 2000 report to the President, 2 vols. Washington, DC: US Government Printing Office.