Bumble bees of North America : an identification guide (Princeton University Press, 2014)
In English.
Paul H. Williams is a research entomologist at the Natural History Museum in London. Robbin W. Thorp is professor emeritus of entomology at the University of California, Davis. Leif L. Richardson is a doctoral candidate in the Department of Ecology and Evolutionary Biology at Dartmouth College. Sheila R. Colla is an NSERC postdoctoral fellow and project leader at Wildlife Preservation Canada.
Description based on online resource; title from PDF title page (publisher's Web site, viewed March 24, 2015)
La pagination de l'édition imprimée correspondante est de : 208p.