1. Allon, O. N. 1953In Experiment in Soil Bacteriology. Burgess Publ. Co., Minneapolis, Minn. USA.
2. Chandra, P. et al. 1960 Weed8, 589–598.
3. Edward, J. C.et al. 1975 Abstr. Paper presented XV Annual Conf. A.M.I., Virbhadra.
4. Flectcher, W. M. 1960In Herbicides and Plant. Ed E. K. Woodford Oxford Sci. Publ.
5. Nayyer, V. K. et al. 1970 Indian J. Agric. Sci.40, 445–451.