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PBR » Topics » The main factors contributing to the quarterly variation in operating income are shown below:This excerpt taken from the PBR 6-K filed Sep 9, 2009. The main factors contributing to the quarterly variation in operating income are shown below:
This excerpt taken from the PBR 6-K filed Aug 18, 2009. The main factors contributing to the quarterly variation in operating income are shown below:
This excerpt taken from the PBR 6-K filed Aug 17, 2009. The main factors contributing to the quarterly variation in operating income are shown below:
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