GUADALUPE, MEXICO — (Marketwire) — 02/20/13 — (OTCBB: SURE) ("Sonora" or the "Company"), a mineral exploration and development company focused on the acquisition and exploration of international silver and gold mining properties, is pleased to announce that on February 15, 2013, the Company entered into an Asset Purchase Agreement ("Purchase Agreement") with Yale Resources Ltd. ("Yale") to purchase all of the right, title and interest in and to the Lo
