title: Studies on the RIF test for the detection of an avian leukosis virus.
mesh_terms: D001355:Alpharetrovirus / Q000302:isolation & purification*; D000818:Animals; D001354:Avian Leukosis Virus / Q000302:isolation & purification*; D001358:Avian Sarcoma Viruses; D066298:In Vitro Techniques; D014776:Virus Cultivation