1. Mineral status of dicotyledon crop plants in relation to their constitutional tolerance to lead;Antosiewiez;Environmental and Experimental Botany,1993
2. Armitage, P., 1971. Statistical Methods in Medical Research. Blackwell Publications, London.
3. Copper enzyme in isolated chloroplast, polyphenol oxidase in Beta vulgaris;Arnon;Plant Physiology,1949
4. Coquery, M., 1990. The relationship between Hg, Pb, Cd, Cu and Fe in Eriocaulon septangulare and certain chemical properties of sediment and waste; a biomonitoring approach. M.Sc. thesis, University of Toronto, Canada.
5. Studies on toxic effects of Hg (II) on Pistia stratiotes;De;Water, Air and Soil Pollution,1985