Publisher： 国家哲学社会科学学术期刊数据库

E-ISSN： 1001-8875|volume|21|52-53

ISSN： 1001-8875

Source： 数学教学通讯, Vol.volume, Iss.21, 2017-01, pp. : 52-53

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