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Santa Monica, CA : RAND, 2009.
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Washington : U.S. Government Publishing Office, 2015. Washington, DC : For sale by the Superintendent of Documents, U.S. Government Publishing Office
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Washington : U.S. Government Printing Office, 2013. Washington, DC : For sale by the Superintendent of Documents, U.S. Government Printing Office.
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Washington : U.S. Government Printing Office, 2013. Washington, DC : For sale by the Superintendent of Documents, U.S. Government Printing Office.
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Washington : U.S. Government Printing Office, 2013. Washington, DC : For sale by the Superintendent of Documents, U.S. Government Printing Office.
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New York : Penguin Press, c2011.
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Washington : U.S. Government Printing Office, 2012. Washington : For sale by the Superintendent of Documents, U. S. Government Printing Office
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Santa Monica, Calif. : Rand Corp., 2011.
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Washington, D.C. : National Academies Press, c2003.
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