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2. Method of Tests for Smoke Density in Flue Gases from Distillate Fuels;ASTM. D2156,1965
3. Aerosol Measurement. Principles, Techniques and Applications,2001
4. Field Investigation of Emissions from Combustion Equipment for Space Heating;Barrett,1973
5. Investigation of Particulate Emissions from Oil-fired Residential Heating Units;Barrett,1974