Faris, W.F. and Elmoselhy, S. 2017. THE TRUE INVENTOR OF SOME EARLY MECHANICAL ENGINEERING DEVICES AND MECHANISMS. Al-Shajarah: Journal of the International Institute of Islamic Thought and Civilization (ISTAC). 22, 1 (Jul. 2017), 29–64. DOI:https://doi.org/10.31436/shajarah.v22i1.587.