VANCOUVER, BRITISH COLUMBIA -- (Marketwired) -- 05/02/13 -- Valterra Resource Corporation (TSX VENTURE: VQA)(FRANKFURT: 3VA) reports that a new +1km-long, NE-trending series of anomalous graphite samples, recently compiled from the Bobcaygeon Graphite Project in Southern Ontario, defines an open-ended, graphite-enriched corridor located
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