Studies on the etiology of infectious atrophic rhinitis in pigs in Bulgaria.
D000818:Animals; D007239:Infections / Q000662:veterinary*; D012222:Rhinitis, Atrophic / Q000209:etiology / Q000382:microbiology / Q000662:veterinary*; D013552:Swine; D013553:Swine Diseases / Q000209:etiology* / Q000382:microbiology