[Morphological study of 4 strains of infectious bovine rhinotracheitis virus isolated in China].
D000818:Animals; D002417:Cattle; D007242:Herpesvirus 1, Bovine / Q000302:isolation & purification / Q000648:ultrastructure*; D007241:Infectious Bovine Rhinotracheitis / Q000382:microbiology; D008854:Microscopy, Electron