Efficiency evaluation of urban and rural municipal water service authorities in South Africa: A data envelopment analysis approach
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2019 ◽
Vol 66
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pp. 2-9
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2014 ◽
Vol 32
(2)
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pp. 93-105
2017 ◽
Vol 103
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pp. 17-25
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2021 ◽
Vol 148
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pp. 879-892