Upadhyay, Prabhakar Minerals and mining in ancient india Minerals and mining in ancient india : from the earliest times to the beginning of christian era._1 Ed, Varanasi : Kala Praka Prabhakar Upadhyay - 1 - Varanasi Kala Prakashan 2007 ISBN: 81-87566-19-1 Dewey Class. No.: 954.01