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1.
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New York : Oxford University Press, 1991.
English | G 58 AGM.T |
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2.
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New York : Pergamon Press, c1980.
English | B 78 SAG.T |
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3.
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Cheltenham, UK : Edward Elgar, 2013
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4.
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Cambridge : Cambridge University Press, 2007.
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5.
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New York : United Nations, Dept. of Public Information, c2002.
English | C 29 NEL.B |
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