BELO HORIZONTE, Brazil, July 18, 2011 /PRNewswire/ -- Usinas Siderurgicas de Minas Gerais S.A. - USIMINAS (OTC: USDMY, USNZY) (BM&FBOVESPA: USIM3, USIM5, USIM6) (Latibex: XUSIO, XUSI) announces the following Webcast: What: Second Quarter 2011 Results Conference Call, which will be released on A
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