Links:
[1] http://admin.indiaenvironmentportal.org.in/news/uttar-pradesh-bihar-have-indias-youngest-population
[2] http://admin.indiaenvironmentportal.org.in/category/author/shreya-shah
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-standard-new-delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/population
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/uttar-pradesh
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bihar
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/census-2011
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/people