Publication Type: Journal Article Authors: Oberhauser, K.S.; M.D. Prysby; H.R. Mattila; D. E. Stanley-Horn; M.K. Sears; G. Dively; E. Olson; J.M. Pleasants; W. F. Lam; R. L. Hellmich Source: PNAS, Volume 98, p.11913-11918 (2001) URL:http://www.pnas.org/content/98/21/11913.full Keywords: Monarch, Pollinators Google ScholarDOIEndNote XML