Acta Metallurgica Sinica(English letters)
邮政投入效率分析
靳瑞婕; 耿奎
- 中央财经大学投资系; 国家邮政局统计处
Ananalysisofefficiencyofpostalinvestment
JIN Rui jie 1; GENG Kui 2
- 1 The Central University of Finance and Economics;2 State Post Bureau;
Acta Metallurgica Sinica(English letters)
靳瑞婕; 耿奎
JIN Rui jie 1; GENG Kui 2