Pollination efficiency of the main bee pollinators of Hedysarum laeve, a legume in Mu Us Sandland, Inner Mongolia
Yanhua Meng, Huanli Xu, Xuan Chen, Qingnian Cai
Biodiv Sci . 2007, (6): 633 -638 .  DOI: 10.1360/biodiv.070151

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