Use of Leaves as Bio-Indicator to Assess Air Pollution Tolerance Index (APTI) And Elemental Concentration of Heavy Metals at Katsina Central Market Grinding Area, Katsina State-Nigeria. Int J Sci Res Sci & Technol [Internet]. 2024 Jun. 20 [cited 2024 Dec. 22];11(3):679-88. Available from: https://ijsrst.com/index.php/home/article/view/IJSRST24113238