Kassir, May George A., Mohanned Mohammed H. AL-Khafaji, and Hussam L. Alwan. 2019. “Computing Cutting Time in Turning Operation Based on AutoCAD Drawings”. Nahrain University College of Engineering Journal 11 (2): 243-50. https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/517.