Ali, Seydie, Tsegaye Kassa, Geletaw Behailu, and Yimer Asfaw. 2024. “The Study of TEC Variations on Some Special Days (Solstices, Equinoxes and Days When the Sun Is Overhead) at Bahir Dar-Station”. Abyssinia Journal of Science and Technology 9 (1):30-39. https://doi.org/10.20372/ajst.2024.9.1.829.