Animal health yearbook, 1969

animal diseases animal health animal population apidae control de enfermedades disease control enfermedades de los animales enfermedades de los peces especies fiebre aftosa fish diseases foot and mouth disease ganado geographical distribution livestock maladie des animaux maladie des poissons monde morbidite morbidity morbosidad mundo population animale sanidad animal species veterinarians veterinarios virus viruses world