NlSHA CHOPRA, and N.K. CHOPRA. “Production of Weed-Free Mother Bulb of Onion (Allium Cepa) through Integration of Herbicides and Weeding”. Indian Journal of Agronomy, vol. 52, no. 1, Oct. 2001, pp. 80-82, https://doi.org/10.59797/ija.v52i1.4897.