(1) Anis, M., Shiran, B. and Wani, A. A. 1998. Genotoxic effect of aldrin and malathion on the root meristem of Vicia faba. Journ. Cytol and Genet. 33:35-42.
(2) Baird, C. 1999. Environmental Chemistry: Second Edition. W. H. Freeman and Company, New York.
(3) Chauhan, L. K. S. and Sundararaman, V. 1990. Effect of sub stituted urea on plants. I. Cytological effects of isopruturon Morais, on the root meristem cells of A. cepa. Cytologia 55: 91-98.