References
- Hungarian Standards: MSZ 21461/1–1988, Requirements of air clearness in workplaces.
- Central Statistical Office . 1986 . State and Protection of the Environment Edited by: Horváth , E. 197 Budapest
- Hungarian Standard Method: MSZ‐21454/1–73.
- Hungarian Standard Method: MSZ 21853/3–1989: Test of air contamination sources. Measuring of the emission of solid impurities.
- Hungarian Standard Method: MSZ 21853/1–1989.
- Hlavay , J. and Inczedy , J. 1985 . Pellet preparation for quantitative determination of inorganic solid substances by infrared spectroscopy . Spectrochimica Acta , 41A : 783 – 787 .
- Hester , R. E. 1986 . Understanding our Environment , 71 London : The Royal Society of Chemistry .
- Kowalski , B. R. 1974 . Pattern Recognition in Chemical Research , Edited by: Klopfstein , C. E. 2 – 74 . New York : Computers and Biochemical Research, Acad. Press .