Gulo, Kristin Wulan Liberti Vivanis, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Medan (Indonesia)
Gultom, Sefri Wahyu Fernando, Jurusan Fisika, FMIPA, Universitas Negeri Meda (Indonesia)

6 - 7 of 7 Items    << < 1 2 

This work is licensed under a Creative Commons Attribution 4.0 International License.