Template:Williams et al., 2008

• Williams, P.H., Cameron, S.A., Hines, H.M., Cederberg, B. & Rasmont, P. 2008. A simplified subgeneric classification of the bumblebees (genus Bombus). Apidologie 39(1): 46-74. DOI: 10.1051/apido:2007052  
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