title: Experimental variability of Venezuelan equine encephalomyelitis virus. II. Properties of mutants induced by nitrous acid.
mesh_terms: D000818:Animals; D000906:Antibodies; D004666:Encephalitis Virus, Venezuelan Equine / Q000187:drug effects / Q000378:metabolism* / Q000472:pathogenicity; D014644:Genetic Variation; D006168:Guinea Pigs; D006358:Hot Temperature; D007114:Immunization; D009154:Mutation; D009573:Nitrites / Q000494:pharmacology*; D011817:Rabbits / Q000276:immunology; D013997:Time Factors; D010948:Viral Plaque Assay
chemical_list: D000906:Antibodies; D009573:Nitrites