Links:
[1] http://admin.indiaenvironmentportal.org.in/news/study-links-oil-drill-ailments
[2] http://admin.indiaenvironmentportal.org.in/category/author/smita-bhattacharyya
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/telegraph-north-east
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oil-exploration
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/assam
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/asthma
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nitrogen-dioxide