Gebreslassie, Abrehet Mehari. “Assessment of the Challenges of Value Chain Process in the Case of Ethiopia,Tigray Manufacturing Sector”. ISPEC International Journal of Social Sciences & Humanities 4, no. 5 (December 31, 2020): 476–492. Accessed March 28, 2024. https://ispecjournal.org/index.php/ispecijssh/article/view/108.