1.
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Vienna [Austria] : Management Concepts, Inc., 2002.
English | A 9 COK.AC |
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2.
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Ottawa : Groupe Communication Canada, 1997.
English | A 41(111:113) BER.V |
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3.
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New York : Practising Law Institute, c2003- Sixth edition.
English | G 111 FAB.B |
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4.
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New York : Oxford University Press, 2006.
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5.
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Frankfurt am Main : P. Lang, c1991.
German | G 58 PAU.P |
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