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- DigitalCommons@University of Nebraska - Lincoln
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- 01/06/2011
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- DigitalCommons@University of Nebraska - Lincoln
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- 01/06/2006
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- DigitalCommons@University of Nebraska - Lincoln
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- 01/12/2013
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- DigitalCommons@University of Nebraska - Lincoln
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- 01/06/2006
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- DigitalCommons@University of Nebraska - Lincoln
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- 01/12/2013
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- DigitalCommons@University of Nebraska - Lincoln
- Publication date
- 01/07/2010
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- DigitalCommons@University of Nebraska - Lincoln
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- 01/12/2010
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- DigitalCommons@University of Nebraska - Lincoln
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- 01/12/2010
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- Publication venue
- DigitalCommons@University of Nebraska - Lincoln
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- 01/08/2010
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- DigitalCommons@University of Nebraska - Lincoln
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- 01/10/2010
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