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Parfomak, Paul W.. (2012). Energy Storage for Power Grids and Electric Transportation : a technology assessment . USA: Congressional Research Service.

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Parfomak, Paul W.. Energy Storage for Power Grids and Electric Transportation : a technology assessment. USA: Congressional Research Service, 2012. Text.

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Parfomak, Paul W.. Energy Storage for Power Grids and Electric Transportation : a technology assessment. USA: Congressional Research Service, 2012. Text.

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Parfomak, Paul W.. Energy Storage for Power Grids and Electric Transportation : a technology assessment. USA: Congressional Research Service, 2012. Print.