Sasa, Mahmood. “Distribution and Reprodudion of Tbe Gray Earth Snake <i>Geophis brachycephalus</i≫ (Serpentes: Colubridae) in Costa Rica”. Revista de Biología Tropical 41, no. 2 (August 1, 1993): 295–297. Accessed December 20, 2024. https://revistas.ucr.ac.cr/index.php/rbt/article/view/23372.