Lancaster, Jhon E. <br/><br/>
Newcastle disease : virus and spread 

 - Ottawa  [s.n.]  1975 
 - 79 páginas  grafs; ilus 
<br/><br/>The virus: Morfology, structure and chemistry. Replicacion. Classification. Strain variation. Spread of the disease: Geographic distrbution. Modes of spread 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Avicultura<br/>Virus de la enfermedad de newcastle<br/>Virus