QUANTITATIVE AND QUALITATIVE EVALUATION OF MORPHOMETRIC INDICES IN SHIRAK REGION FROM THE VIEWPOINT OF EVALUATION OF ECOLOGICAL SITUATION. Proc. YSU C: Geol. Geogr. Sci. 2007, 41 (1 (212), 131-137. https://doi.org/10.46991/PYSU:C/2007.41.1.131.