Links:
[1] http://admin.indiaenvironmentportal.org.in/news/apdcl-buy-power-digboi-refinery
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/assam-tribune-guwahati
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/petrochemical-industry
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/assam
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-oil-corporation-ioc