1.
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London : Jessica Kingsley, 2003.
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2.
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London : Jessica Kingsley, 2003.
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3.
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London ; Philadelphia : Jessica Kingsley Publishers, 2007.
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4.
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London : Philadelphia : Jessica Kingsley Publishers, 2008.
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5.
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London ; Philadelphia : J. Kingsley, 2002.
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6.
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London ; Philadelphia : Jessica Kingsley, 2001.
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7.
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New York : Marlowe & Co., c2006.
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