Haemophilus influenzae type b resistant to both chloramphenicol and ampicillin in Britain.Br Med J (Clin Res Ed) 1982; 284 doi: https://doi.org/10.1136/bmj.284.6329.1634-b (Published 29 May 1982) Cite this as: Br Med J (Clin Res Ed) 1982;284:1634
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