Animal health yearbook, 1971

animal diseases animal health animal population apidae aves de corral control de enfermedades disease control enfermedades de los animales enfermedades de los peces 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 poultry sanidad animal vaccination veterinarians veterinarios virus viruses volaille world