title: The influence of antibodies in vivo and in vitro on cellular and cell-free preparations of atype 3 avian leukosis virus.
mesh_terms: D000818:Animals; D000917:Antibody Formation; D001354:Avian Leukosis Virus / Q000276:immunology*; D002474:Cell-Free System; D002645:Chickens; D009374:Neoplasms, Experimental / Q000209:etiology*; D009500:Neutralization Tests