Hints from the Health Department. Leaflet from the archive of the Society of Medical Officers of Health. Credit: Wellcome Collection, London
[Report of the Medical Officer of Health for Brentford and Chiswick]
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GRAPH ''C"
VARIATION IN AVERAGE MONTHLY CONCENTRATIONS OF SMOKE
AND SULPHUR DIOXIDE IN BRENTFORD AND CHISWICK DURING 1961
CONCENTRATIONS EXPRESSED IN MICROGRAMMES PER CUBIC METRE
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