Suvaryan, S.R. “ESSENCE AND MISSION OF THE SERVICE”. Proceedings of the YSU C: Geological and Geographical Sciences 54, no. 1 (251) (April 15, 2020): 62–65. Accessed May 10, 2024. https://journals.ysu.am/index.php/proceedings-geol-geogr/article/view/vol54_no1_2020_pp062-065.