Kingsbury, D W Studies on mixed infection with Newcastle disease virus. IV. On the structure of heterozygotes. [electronic resource] - Virology Sep 1970 - 262-5 p. digital Publication Type: Journal Article ISSN: 0042-6822 Standard No.: 10.1016/0042-6822(70)90266-7 doi Subjects--Topical Terms: AnimalsCentrifugation, Density GradientChick EmbryoCulture TechniquesFibroblastsHeterozygoteNewcastle disease virus--drug effectsRadiation EffectsUltraviolet Rays