Links:
[1] http://admin.indiaenvironmentportal.org.in/news/gas-reserve-found-tripura
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/assam-tribune-guwahati
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/energy
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/natural-gas-exploration
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agartala
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-tripura
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oil-and-natural-gas-corporation-ongc