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McEvedy CP, Beard AW.McEvedy CP, et al. Among authors: beard aw.Br Med J. 1970 Jan 3;1(5687):7-11. doi: 10.1136/bmj.1.5687.7.Br Med J. 1970.PMID: 5411611Free PMC article.
McEvedy CP, Beard AW.McEvedy CP, et al. Among authors: beard aw.Br Med J. 1970 Jan 3;1(5687):11-5. doi: 10.1136/bmj.1.5687.11.Br Med J. 1970.PMID: 5411596Free PMC article.