H.Ali S. UTM coordinates correction between WGS84 and Clarke 1880 ellipsiod in Mosul by using GPS. EDUSJ [Internet]. 2005 Sep. 1 [cited 2025 Aug. 4];17(4):142-53. Available from: https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17092