Beard, J. D., Beck, C., Graham, R., Packham, S. C., Traphagan, M., Giles, R. T., & Morgan, J. G. (2012). Winter Temperature Inversions and Emergency Department Visits for Asthma in Salt Lake County, Utah, 2003–2008. National Institute of Environmental Health Sciences.

Beard, John D., Celeste Beck, Randall Graham, Steven C. Packham, Monica Traphagan, Rebecca T. Giles, and John G. Morgan. Winter Temperature Inversions and Emergency Department Visits for Asthma in Salt Lake County, Utah, 2003–2008. National Institute of Environmental Health Sciences, 2012.

Beard, John D., et al. Winter Temperature Inversions and Emergency Department Visits for Asthma in Salt Lake County, Utah, 2003–2008. National Institute of Environmental Health Sciences, 2012.