Mata-López, Rosario, Luis García-Prieto, and Virginia León-Règagnon. “Helminths of the American Bullfrog, Lithobates Catesbeianus (Shaw, 1802), from Pawnee Lake, Lancaster, Nebraska, USA With a Checklist of Its Helminth Parasites”. Zootaxa 2544, no. 1 (July 21, 2010): 1–53. Accessed April 5, 2025. https://mapress.com/zt/article/view/zootaxa.2544.1.1.