[Investigations on the isolation and identification of a virus of the pararickettsial group from calves with enzootic bronchopneumonia].
D000818:Animals; D001996:Bronchopneumonia / Q000662:veterinary*; D002417:Cattle; D012282:Rickettsia Infections / Q000662:veterinary*
BRONCHOPNEUMONIA/veterinary; RICKETTSIAL DISEASES/veterinary