Books by George A. Soper
Further studies of European me
Further studies of European methods of street cleaning and refuse disposal
Street cleaning and refuse col
Street cleaning and refuse collection and disposal in European cities
Health of the troops in the Un
Health of the troops in the United States during 1918
Modern methods of street cleaning
The air and ventilation of subways
The pollution of New York harb
The pollution of New York harbor
The air of the New York subway
The air of the New York subway prior to 1906
The health of employees in the
The health of employees in the New York subway
The epidemic of typhoid fever at Ithaca, N. Y.
Mosquito extermination in New York city
The purification of drinking water by the use of ozone ...