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Emerald, 1986
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Emerald, 1987
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Informa UK Limited, 1986
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Emerald, 1984
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Emerald, 1985
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Informa UK Limited, 1984
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Emerald, 1984
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Emerald, 1984
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Emerald, 1983
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Emerald, 1983
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Emerald, 1982
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Emerald, 1983
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Emerald, 1983
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Emerald, 1983
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Emerald, 1983
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Emerald, 1979
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Elsevier BV, 1981
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Emerald, 1979
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Emerald, 1980
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Emerald, 1979