M.K. Nehra, and Jitendra Kumar Malik. “Effect of Copper and Zinc As a Supplement Fertilizer on Growth of Radish (Raphanus Sativus) Root and Foliage”. CURRENT HORTICULTURE, vol. 12, no. 2, June 2024, pp. 67-69, https://currenthorticulture.com/index.php/CURHOR/article/view/131.