Hedberg, C. W., Greenblatt, J. F., Matyas, B. T., Lemmings, J., Sharp, D. J., Skibicki, R. T., & Liang, A. P. (2008). Timeliness of Enteric Disease Surveillance in 6 US States. Centers for Disease Control and Prevention.

Hedberg, Craig W., Jesse F. Greenblatt, Bela T. Matyas, Jennifer Lemmings, Donald J. Sharp, Richard T. Skibicki, och Arthur P. Liang. Timeliness of Enteric Disease Surveillance in 6 US States. Centers for Disease Control and Prevention, 2008.

Hedberg, Craig W., et al. Timeliness of Enteric Disease Surveillance in 6 US States. Centers for Disease Control and Prevention, 2008.