*[http://cal.vet.upenn.edu/projects/parasit06/website/index.htm Imágenes de Parasitología Veterinaria "Courtesy of Thomas Nolan, Laboratory of Parasitology, University of Pennsylvania School of Veterinary Medicine" ] | *[http://cal.vet.upenn.edu/projects/parasit06/website/index.htm Imágenes de Parasitología Veterinaria "Courtesy of Thomas Nolan, Laboratory of Parasitology, University of Pennsylvania School of Veterinary Medicine" ] |