Publisher： 国家哲学社会科学学术期刊数据库

E-ISSN： 1002-6487|volume|23|140-143

ISSN： 1002-6487

Source： 统计与决策, Vol.volume, Iss.23, 2015-01, pp. : 140-143

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next