“Theoretical Studies on the Justification of the Angle of Installation in Relation to the Direction of Movement of the Improved Harrow Leveller”. American Journal of Engineering , Mechanics and Architecture (2993-2637) 1, no. 7 (September 17, 2023): 49–55. Accessed January 27, 2026. https://www.grnjournal.us.e-scholar.org/index.php/AJEMA/article/view/748.