Abarca, Juan G., and Alejandro Solórzano. “Range Extension of the Checkered Gartersnake, Thamnophis Marcianus (Baird and Girard 1853), from Costa Rica ”. Reptiles & Amphibians 27, no. 3 (November 29, 2020): 411–412. Accessed November 22, 2024. https://journals.ku.edu/reptilesandamphibians/article/view/14855.