Guj State Petro Standalone December 2018 Net Sales at Rs 453.79 crore, up 25.77% Y-o-Yhttps://www.moneycontrol.com/news/business/earnings/guj-state-petro-standalone-december-2018-net-sales-at-rs-453-79-crore-up-25-77-y-o-y-3512371.html#GSPL