London's Pulse: Medical Officer of Health reports 1848-1972
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Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
Brentford and Chiswick 1950
[Report of the Medical Officer of Health for Brentford and Chiswick]
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GRAPH "D"
COMPARISON OF CONCENTRATIONS OF SMOKE IN THE AlR
AT CHISWIGK, CENTRAL LONDON, LEEDS AND LERWICK
-39-