Links:
[1] http://admin.indiaenvironmentportal.org.in/news/coal-india-seal-deals-abroad-six-months
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mining
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mineral-based-industry
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/industry
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/coal-india