Lamar, W. W., & Sasa, M. (2003). A new species of hognose pitviper, genus Porthidium, from the southwestern Pacific of Costa Rica (Serpentes: Viperidae). Universidad de Costa Rica.
Chicago Style CitationLamar, William W., and Mahmood Sasa. A New Species of Hognose Pitviper, Genus Porthidium, From the Southwestern Pacific of Costa Rica (Serpentes: Viperidae). Universidad de Costa Rica, 2003.
MLA CitationLamar, William W., and Mahmood Sasa. A New Species of Hognose Pitviper, Genus Porthidium, From the Southwestern Pacific of Costa Rica (Serpentes: Viperidae). Universidad de Costa Rica, 2003.
Warning: These citations may not always be 100% accurate.