Ashenef A, Engidawork E. Fluoride levels and its safety in Tea (<i>Camellia sinensis</i>) and Khat (<i>Catha edulis</i>) imported and produced in Ethiopia. Ethiop. J. Env Stud &amp; Manag [Internet]. 2013 Mar. 6 [cited 2026 Oct. 9];6(2):149-58. Available from: https://www.ajol.info/index.php/ejesm/article/view/86157