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OVER THE PAST 6 YEARS, THE NUMBER OF VISITORS TO THE ECOLOGICAL CENTERS OF THE NATIONAL PARK “ELK ISLAND” INCREASED BY 40 PERCENT
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OVER THE PAST 6 YEARS, THE NUMBER OF VISITORS TO THE ECOLOGICAL CENTERS OF THE NATIONAL PARK “ELK ISLAND” INCREASED BY 40 PERCENT. Alternative Energy and Ecology (ISJAEE). 2019;(01-03):134-135. (In Russ.)
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