Yada T, T Nakayama and T Ueda (1995). “Efficiency Evaluation between Branch Offices Using Data Envelopment Analysis.” NTT R and D 44(7): 43-48.

Yada T, T Nakayama and T Ueda (1995). “Efficiency Evaluation between Branch Offices Using Data Envelopment Analysis.” NTT R and D 44(7): 43-48.

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