“Elucidation of the Impact of Lead Chloride on Growth Characteristics and Chlorophyll Content in Two Varieties of Sunflower (Helianthus annuus L.): Effect of Lead Chloride on Sunflower”, Pakistan Journal of Scientific & Industrial Research, vol. 69, no. 1, pp. 1–8, Mar. 2026, doi: 10.52763/PJSIR.BIOL.SCI.69.1.2026.1.8.