Resources & Industries ›› 2008, Vol. 10 ›› Issue (6): 27-32.
• RESOURCES INDUSTRIES • Previous Articles Next Articles
ZHANG Xiong-hua, ZHANG Shu-ying
(School of Economy and Management, Southwest Petroleum University, Chengdu 610500, China)
(西南石油大学 经济管理学院,四川 成都 610500)