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Basel: MDPI, 2021
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World Bank, Washington, DC, 2015
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World Bank, Washington, DC, 2009
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World Bank, Washington, DC, 2016
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World Bank, Washington, DC, 2011
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World Bank, Washington, DC, 2010
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World Bank, Washington, DC, 2002
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World Bank, Washington, DC, 2016
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World Bank, Washington, DC, 2013
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World Bank, Washington, DC, 2016
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Washington, DC, 2012
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Washington, DC, 2010
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World Bank, Washington, DC, 2016
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Elsevier BV, 2014
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Elsevier BV, 2012
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Elsevier BV, 1993
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Elsevier BV, 1990
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Elsevier BV, 1986
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Elsevier BV, 2014
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Elsevier BV, 1993