A survey of honey bee colony losses in the United States, fall 2008 to spring 2009 vanEngelsdorp, Dennis ; Hayes, Jerry, Jr. ; Underwood, Robyn M. ; Pettis, Jeffery S. Abstract Publication: Journal of Apicultural Research Pub Date: January 2010 DOI: 10.3896/IBRA.1.49.1.03 Bibcode: 2010JApiR..49....7V