Xu D (2004). “Productivity Growth in the Presence of Environmental Regulations in Chinless Industry.” in Emrouznejad A and V Podinovski (eds.) Proceedings of DEA2004, Birmingham, UK: 273.

Xu D (2004). “Productivity Growth in the Presence of Environmental Regulations in Chinless Industry.” in Emrouznejad A and V Podinovski (eds.) Proceedings of DEA2004, Birmingham, UK: 273.

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