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Humphrey Francis Humphreys, C.B.E., M.C., T.D., D.L., hon LL.D., M.B., Ch.B., M.D.S., F.D.S., F.S.A. Br Dent J 142, 347–348 (1977). https://doi.org/10.1038/sj.bdj.4803916
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DOI: https://doi.org/10.1038/sj.bdj.4803916