1. WSO, World Steel Production, (2018). www.worldsteel.org.
2. USGS Mineral commodity summaries 2018 2018 Washington, DC.
3. CEA, CEA report, Www.Cea.Nic.in/Annualreports.Html. (2015). http://www.cea.nic.in/annualreports.html.
4. IMY, Indian Mineral Yearbook, (2015). http://ibm.nic.in/index.php?c=pages&m=index&id=551.
5. TATA, Tata Steel Annual Report, (2015). http://www.tatasteel.com/investors/annual-report-2015-16/html/index.html.