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1Έκδοση 1997“…Office for Official Publications of the European Communities,…”
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2Έκδοση 1999“…Office for Official Publications of the European Communities,…”
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3ανά Salvage, Ann V.“…European Foundation for the Improvement of Living and Working Conditions ; Office for Official Publications of the European Communities ;…”
Έκδοση 1995
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4Έκδοση 1993“…European Foundation for the Improvement of Living and Working Conditions ; Office for Official Publications of the European Communities ; UNIPUB,…”
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