Simonyan, A. and Pirumyan, G. 2017. ANALYSIS OF ENVIRONMENTAL STATUS OF THE RIVERS VOROTAN, SISIAN AND GORIS. Proceedings of the YSU B: Chemical and Biological Sciences. 51, 1 (242) (Mar. 2017), 12–16. DOI:https://doi.org/10.46991/PYSU:B/2017.51.1.012.