1. A. Goetz,Basic Problems in the Detection of Microbiological Air Pollution. Amer. Industr. Hygiene Quarterly, Vol. 16, 113/19, 1955.
2. Quoted fromD. Sinclair,Stability and Behavior of Aerosols Particle. AEC Handbook of Aerosols, p. 71 Washington 1950.
3. K. Schwendemann,Das Aerosolspektrometer. Ber. Schwebstofftechn. Arbeitstagung Mainz 1954, p. 63–65.
4. Leslie Silverman &Ch. E. Billings Methods of Generation of solid Aerosols. Jour. Air Poll. Ass., Vol. 6. 76–83, 1956.
5. Chas. D. Yaffé, A. D. Hosey &J. T. Chambers Jr. The Spiral Sampler—A New Tool for Studying Particulate Matter, A. M. A. Archives of Ind. Hyg. and Occupational Medicine, Vol. 5, 62–70, 1952.