Johnson, Y.J., M.M. Colby, N.L. Tablante, F.N. Hegngi, M. Salem, N. Gedamu, and C. Pope. “Application of Commercial and Backyard Poultry Geographic Information System Databases for the Identification of Risk Factors for Clinical Infectious Laryngotracheitis in a Cluster of Cases on the Delmarva Peninsula”. International Journal of Poultry Science 3, no. 3 (February 15, 2004): 201–205. Accessed September 22, 2025. https://ijpsjournal.org/index.php/ijps/article/view/165.