Leaf Anatomy and Micromorphology Characteristics of Ketum [Mitragyna speciosa (Korth.) Havil.] (Rubiaceae). tlsr [Internet]. 2021 Mar. 31 [cited 2024 Dec. 23];32(1):107–117. Available from: https://ejournal.usm.my/tlsr/article/view/tlsr_vol32-no-1-2021_7