Screening of Heavy Metals in Thurusu Vaippu (Copper Sulphate) - A Siddha Preparation. Int J Ayu Pharm Res [Internet]. 2022 Jun. 5 [cited 2025 Dec. 28];10(5):17-9. Available from: https://www.ijapr.in/index.php/ijapr/article/view/2375