Lu W-J, Z-X Fu, Y-L Geng and B-H Zhang (2005). “Input-Output Efficiency Analysis of Hebei High and New Technology Enterprise Development Zones.” Hebei J Industrial Science and Technology 22(4): 186-197.
Lu W-J, Z-X Fu, Y-L Geng and B-H Zhang (2005). “Input-Output Efficiency Analysis of Hebei High and New Technology Enterprise Development Zones.” Hebei J Industrial Science and Technology 22(4): 186-197.