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Humphreys, Noel A.
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English vaccination and small pox statistics : with special reference to the report of the Royal Commission, and to recent small pox epidemics / by Noel A. Humphreys.
Humphreys, Noel A.Date: [1897]
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Vital statistics : a memorial volume of selections from the reports and writings of William Farr / edited for the Sanitary Institute of Great Britain by Noel A. Humphreys.
Farr, William, 1807-1883.Date: 1885