Wang Z-L, J-H Tian and L Qiu (2005). “Data Envelopment Analysis of Urban Water Supply Performance.” Shuili Xuebao/J Hydraulic Engineering 36(12): 1486-1491.

Wang Z-L, J-H Tian and L Qiu (2005). “Data Envelopment Analysis of Urban Water Supply Performance.” Shuili Xuebao/J Hydraulic Engineering 36(12): 1486-1491.

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