Mkrtchyan, H.H. and Avetisyan, A.A. 2009. ESTIMATION OF QUALITY APPROBATION OF ORE OF HANQAVAN MOLYBDENUM DEPOSITS. Proceedings of the YSU C: Geological and Geographical Sciences. 43, 1 (218) (Apr. 2009), 20–24. DOI:https://doi.org/10.46991/PYSU:C/2009.43.1.020.