Bumblebees -- United States -- Geographical distribution. / https://id.loc.gov/authorities/subjects/sh85017981 https://id.loc.gov/authorities/names/n78095330-781 https://id.loc.gov/authorities/subjects/sh99002137 : Williams, Paul
2015
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Bumblebees -- United States -- Identification. / https://id.loc.gov/authorities/subjects/sh85017981 https://id.loc.gov/authorities/names/n78095330-781 https://id.loc.gov/authorities/subjects/sh99001565 : Williams, Paul