Marabyan, S., Margaryan, L. and Pirumyan, G. (2014) “STUDY OF CONTENT OF Cr, As, Cd, Pb ELEMENTS IN SOME RIVERS OF ARMENIA”, Proceedings of the YSU B: Chemical and Biological Sciences, 48(3 (235), pp. 51–54. doi: 10.46991/PYSU:B/2014.48.3.051.