1. “Electron Microscopy and X-ray Applications to Environmental and Occupational Health Analysis”;Ahlberg,1978
2. A New Instrument for Evaluating the Visual Quality of Air
3. Simultaneous nitric acid, particulate nitrate and acidity measurements in ambient air
4. “The Character and Origins of Smog Aerosols”;Appel,1980
5. “The Character and Origins of Smog Aerosols”;Appel,1980