Publisher： 国家哲学社会科学学术期刊数据库

E-ISSN： 1671-7252|31|3|26-31

ISSN： 1671-7252

Source： 北京农业职业学院学报, Vol.31, Iss.3, 2017-01, pp. : 26-31

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