“Astudy and Analysis of Geomagnetic Field By using Model of International Geomagnetic Reference Field (IGRF- 2000)”, IHJPAS, vol. 19, no. 2, pp. 29–37, Nov. 2017, Accessed: May 13, 2024. [Online]. Available: https://jih.uobaghdad.edu.iq/index.php/j/article/view/1566