[Serological study of the spread in Italy of different types of the virus of avian infectious bronchitis].
D000818:Animals; D001991:Bronchitis / Q000382:microbiology*; D002645:Chickens; D007558:Italy; D014611:Vaccination; D014777:Virus Diseases / Q000453:epidemiology / Q000276:immunology*
Studio sierologico sulla diffusione in Italia di vari tipi del virus della bronchite infettiva aviaria.