VISION OF SERVICE AND NECESSITY OF SERVICEOLOGY. Proc. YSU C: Geol. Geogr. Sci. [Internet]. 2015 Dec. 14 [cited 2026 Mar. 10];49(3 (238):42-50. Available from: https://journals.ysu.am/proceedings-geol-geogr/article/view/vol49_no3_2015_pp042-050