Kamal-aldeen, Nashwan, and Sabah Hussein Ali. “Using of GPS and Leveling Techniques for Determining the Orthometric Heights Inside Mosul University”. Al-Rafidain Engineering Journal (AREJ) 16, no. 3 (July 28, 2008): 132–142. Accessed September 5, 2025. https://jamh.uomosul.edu.iq/index.php/arej/article/view/31292.