Authors
Gao Xiaoxing
Shijiazhuang University of Economics, Shijiazhuang, China
Feng Sumin
Shijiazhuang Engineering Vocational College, Shijiazhuang, China
Cui Han
Shijiazhuang University of Economics, Shijiazhuang, China
© 2015 Gao Xiaoxing, Feng Sumin, Cui Han, published by Professor Subhas Chandra Mukhopadhyay
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.