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GINSBURG J, DUFF RS.GINSBURG J, et al. Among authors: duff rs.Br Med J. 1958 Aug 16;2(5093):424-7. doi: 10.1136/bmj.2.5093.424.Br Med J. 1958.PMID: 13560888Free PMC article.No abstract available.
DUFF RS.DUFF RS.Br Med J. 1959 Apr 18;1(5128):1007-9. doi: 10.1136/bmj.1.5128.1007.Br Med J. 1959.PMID: 13638613Free PMC article.No abstract available.