Martirosyan, L. et al. 2017. RECREATIONAL ASSESSMENT OF HYPSOMETRIC ZONES OF THE NORTHERN ARMENIA: (SHIRAK, LORI, TAVUSH). Proceedings of the YSU C: Geological and Geographical Sciences. 51, 3 (244) (Dec. 2017), 189–194. DOI:https://doi.org/10.46991/PYSU:C/2017.51.3.189.