Antimicrobial Activity of Aqueous Methanolic Extract of Lichen (Usnea barbata) Against Escherichia coli and Staphylococcus aureus. م ل ع ت ب [Internet]. 2024 Jun. 30 [cited 2025 Sep. 25];6(1):19-23. Available from: https://www.srcest.org.ly/journal/index.php/ljest/article/view/40