00652naa#a2200229#i#450# EN\INFRA-M\bibl\11457 20241128234139.4 1998-071X 20160225b2016####ek#y0engy0150####ca RUS RU Rare Earth Metals Leaching from Coal Ash and Theirs Concentration Journal article Moscow INFRA-M Academic Publishing LLC. 2016 7 с. Journal article local Senik E. Vinogradov M. Taranov R. Kozodaev A. Ksenofontov Boris Semenovich Voropaeva A. naukaru.ru