Template:Niu, Zhu & Kuhlmann, 2013

• Niu, Z.-q.; Zhu, C.-D.; Kuhlmann, M. 2013: Bees of the Colletes clypearis-group (Hymenoptera: Apoidea: Colletidae) from China with descriptions of seven new species. Zootaxa 3745(2): 101–151. DOI: 10.11646/zootaxa.3745.2.1  
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