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  ÐÀ2670

.Îïàçâàíå íà îêîëíàòà ñðåäà [ñïèñàíèå:äðóãà] / ÖÈÍÒÈ - Ãîä. 1, N 1 (1974) - Ãîä. 18, N 2 (1991). - Ñîôèÿ : ÖÈÍÒÈ, 1974-1991. - 20 ñì

.ISSN 0204-7497
.ÓÄÊ 502+574(075.8)
Åêîëîãèÿ - Áúëãàðèÿ
Îêîëíà ñðåäà - îïàçâàíå

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