1. Train, D. (1976), Chemy Ind., 15, 621–4.
2. BS 3405 (1961): Simplified Methods for Measurement of Grit and Dust Emission from Chimneys.
3. BS 893 (1940): Methods of Testing Dust-Extraction Plant and the Emission of Solids from Chimneys.
4. Stairmand, C.J. (1951), Sampling of dust-laden gases. Trans. Inst. Chem. Engrs, 29, 31.
5. Sansone, E.B. (1969), Am. Ind. Hyg. Assoc. J., Sept.-Oct., 487-93