title: Occurrence of contaminating viruses in various swine fever virus strains. II. Studies on Gillespie's cytopathic type-A strain and on other strains.
mesh_terms: D000818:Animals; D006691:Classical Swine Fever / Q000382:microbiology*; D003588:Cytopathogenic Effect, Viral; D012328:RNA Viruses / Q000254:growth & development*; D013552:Swine