title: The morphology of three previously uncharacterized human respiratory viruses that grow in organ culture.
mesh_terms: D046508:Culture Techniques; D008722:Methods; D008854:Microscopy, Electron; D018108:Respirovirus / Q000302:isolation & purification*; D014776:Virus Cultivation; D014713:Viruses, Unclassified / Q000302:isolation & purification*