Publisher： 国家哲学社会科学学术期刊数据库

E-ISSN： 1002-1981|volume|1|70-72

ISSN： 1002-1981

Source： 高等农业教育, Vol.volume, Iss.1, 2015-01, pp. : 70-72

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