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1.
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New York : Wiley, c1997.
English | D 740 HAL.W |
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2.
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New York : Wiley, c1983.
English | B 355 SMA.S |
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3.
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Frankfurt am Main : P. Lang, c1991.
German | G 58 PAU.P |
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4.
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Geneva, Switzerland : International Labour Office, 2002.
English | C 316 INT.L(E) |
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5.
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Cambridge, Mass. : Mit, 2004.
English | F 633 ARO.M 21 |
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6.
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London, : Sweet and Maxwell, 1971.
English | F 13 ZAP.E |
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7.
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New York : McGraw-Hill, c2002.
English | D 87 ROS.A |
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8.
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Geneva, Switzerland : International Labour Office, 2000.
Second edition.
English | A 93 CHA.V |
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