MTNL Standalone September 2018 Net Sales at Rs 444.12 crore, down 30.85% Y-o-Yhttps://www.moneycontrol.com/news/business/earnings/mtnl-standalone-september-2018-net-sales-at-rs-444-12-crore-down-30-85-y-o-y-3176841.html#MTNL