scholarly journals Regional Differences of China's Social Security Efficiency Based on DEA

Author(s):  
Xiuzhi He ◽  
Chaoqi Li
JAMA ◽  
1966 ◽  
Vol 197 (6) ◽  
pp. 413-416
Author(s):  
R. J. Myers
Keyword(s):  

Author(s):  
W. Andrew Achenbaum
Keyword(s):  

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