LIMA, Peru, July 12, 2011 /PRNewswire/ -- Compania de Minas Buenaventura (NYSE: BVN; Lima Stock Exchange: BUENAVC1) announces the following webcast: What: Compania de Minas Buenaventura Second Quarter 2011 Conference Call When: Wednesday, July 27, 2011 11:00 AM Eastern Where: http://www.videonewswir
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