Lawson, D. (1996) “Sexual dimorphism and reproduction of the pitviper Porthidium ophryomegas (Serpentes: Viperidae) in Guatemala”, Revista de Biología Tropical, 44(3B), pp. 671–674. Available at: https://revistas.ucr.ac.cr/index.php/rbt/article/view/31026 (Accessed: 19December2024).