Links:
[1] http://admin.indiaenvironmentportal.org.in/news/first-standard-gauge-metro-train-ships
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-transport
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/metro
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-metro-rail-corporation-dmrc
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/imports
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi