Guyumjyan, H. and Gyurjyan, A. 2018. GEOLOGICAL CONDITIONS OF ORIGIN OF SECONDARY AMULSAR QUARTS. Proceedings of the YSU C: Geological and Geographical Sciences. 52, 2 (246) (Aug. 2018), 95–101. DOI:https://doi.org/10.46991/PYSU:C/2018.52.2.095.