Mollah, M. R. A., M. A. Ali, M. Ahmad, M. K. Hassan, and M. Z. H. Prodhan. “Effect of Organic Manures on the Yield and Quality of True Seeds of Onion”. International Journal of Applied Sciences and Biotechnology 3, no. 2 (June 25, 2015): 162-166. Accessed May 17, 2021. https://www.nepjol.info/index.php/IJASBT/article/view/12279.