农业科研单位开展农技推广工作的模式调查——以石家庄市农林科学研究院为例
농업과연단위개전농기추엄공작적모식조사——이석가장시농림과학연구원위례
Investigation on Modes of Agricultural Extension in Agricultural Science Research Units,Taking Academy of Agricultural and Forestry Sciences of Shijiazhuang City As a Case
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