Al-Thawr, A. A.-M. I. Q. (2023) “Coffee Trade during the Reign of Imam Yahya bin Mohammed Hamiduddin and His Son, Imam Ahmed Yahya Hamiduddin 1322 AH - 1382 AH / 1904 – 1962 (A Historical Documentary Study " ”, Sana’a University Journal of Human Sciences, 5(1). doi: 10.59628/jhs.v5i1.586.