title: Replication of gross leukemia virus in long-term cultures of rat thymomas: bioassays and electron microscopy.
mesh_terms: D000818:Animals; D001681:Biological Assay; D002417:Cattle; D004622:Embryo, Mammalian; D066298:In Vitro Techniques; D007668:Kidney; D009052:Leukemia Virus, Murine / Q000254:growth & development*; D051379:Mice; D008854:Microscopy, Electron; D010587:Phagocytosis; D051381:Rats; D013154:Spleen; D013945:Thymoma; D013950:Thymus Gland; D014776:Virus Cultivation