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农学学报
蜂群入场时间对蜜蜂采集梨花粉习性的影响
郭媛,张旭凤
The research on introduced bee colonies in different florescence on the effect of pear pollination
农学学报 . 2015, (8): 105 -110 .  DOI: 10.11923/j.issn.2095-4050.2014-xb0898