SMIDA, J [Comparison of two method of purification of fowl tumor B77 virus by precipitation with ammonium sulfate and by fractional centrifugation]. [electronic resource] - Ceskoslovenska onkologia 1955 - 149-55 p. digital Publication Type: Journal Article Subjects--Topical Terms: Ammonium SulfateAnimalsCentrifugationImmune System PhenomenaNeoplasms, ExperimentalOncogenic VirusesViruses