With construction of Delhi Metro's Phase II progressing at a brisk pace, the first tunnel for the new underground section
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/s-delhi-metro-tunnel-work-completed
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-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/delhi