Abbas Neam Al dami, Haidar, and Isaraa Riyadh Abdulridha. “The Possibility of Using Navigation GPS Devices in the Survey Engineering”. International Journal of Engineering & Technology, vol. 7, no. 4.20, Nov. 2018, pp. 293-8, https://doi.org/10.14419/ijet.v7i4.20.25942.