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London: Home Office Research, Development and Statistics Directorate, 2001
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London: Home Office, 1999
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London: Home Office Research, Development and Statistics Directorate, 2000
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New Haven, Conn.: Yale Univ. Pr., 1982
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London: Home Office Research, Development and Statistics Directorate, 2001
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London: Routledge, 1996
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Oxford [u.a.]: Oxford University Press, 06-94