Antimicrobial resistance trends in clinical Escherichia coli and Klebsiella pneumoniae in Ethiopia oleh Abera A. Kitaba, Zelalem T. Bonger, Degefu Beyene, Zeleke Ayenew, Estifanos Tsige, Tesfa Addis Kefale, Yonas Mekonnen, Dejenie S. Teklu, Elias Seyoum, Abebe A. Negeri