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	[книга]
	Topical scientific researches into resource-saving technologies of mineral mining and processing
	Malanchuk, Zinovii Romanovyc редактор, и др.
	Sofia : St. Ivan Rilski
	2020
ISBN:	978-954-353-408-1
	Полезни изкопаеми Енергийна ефективност Минерали

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