Arora, D J Two-step centrifugation method. A simplification of the density-gradient procedure for the purification of influenza virus. [electronic resource] - Canadian journal of microbiology May 1973 - 633-8 p. digital Publication Type: Comparative Study; Journal Article ISSN: 0008-4166 Standard No.: 10.1139/m73-104 doi Subjects--Topical Terms: AnimalsBody FluidsCentrifugation, Density GradientChick EmbryoExtraembryonic MembranesHemagglutination TestsHemagglutinins, Viral--analysisMethodsOrthomyxoviridae--growth & developmentSucroseUltracentrifugation