INTERFERENCE EXPERIMENTS RELATING TO WHETHER TOBACCO MOSAIC VIRUS  AND CUCUMBER VIRUSES 3 AND 4 ARE STRAINS OF THE SAME VIRUS.
D018553:Cucumis sativus; D010942:Plant Viruses; D012106:Research; D014027:Tobacco Mosaic Virus
EXPERIMENTAL LAB STUDY; PLANT VIRUSES; TOBACCO MOSAIC VIRUS