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1Published 1983“…Brussels: Socialist Group European Parliament…”
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2“…Brussels: Socialist Group of the European Parliament…”
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3“…Brussels: Socialist Group European Parliament…”
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4Published 1988“…Brussels: Socialist Group European Parliament…”
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5Published [1988]“…Socialist Group of the European Parliament,…”
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6“…[Brussels] : Socialist Group in the European Parliament, cop. 2008…”
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