August 30, 2012 12:36 PM Eastern Daylight Time  Gold, Copper Explorer Liberty Star Receives ZTEM Proposal for the Tombstone Super Project – Southeastern Arizona TUCSON, Ariz.–(BUSINESS WIRE)–Mineral explorer Liberty Star Uranium & Metals Corp. (“Liberty Star” or the “Company”)(LBSR: OTCQB) is pleased to announce that a proposal for a helicopter-borne ZTEM (geophysical) survey has been received […]