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Köln: Evergreen GmbH, 2008
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Washington, DC: World Bank, 2014
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JSTOR, 1970
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Oxford University Press, 1970
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Cambridge University Press (CUP), 1970
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Washington, D.C: The World Bank, 2015
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Washington, DC: International Bank for Reconstruction and Development / The World Bank, 2014 ; 2014
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Springer Science and Business Media LLC, 1984
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British Medical Association, 1956
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Oxford University Press (OUP), 2006
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British Medical Association, 1987
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Ovid Technologies (Wolters Kluwer Health), 1984
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Ovid Technologies (Wolters Kluwer Health), 1985
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Springer Science and Business Media LLC, 2021