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| ÐÀ4023 |
Åêîñïåêòúð [ñïèñàíèå:ìåñå÷íèê] : Áþëåòèí-Äàéäæåñò%Íåçàâèñèìî ìåñå÷íî èçäàíèå ïî âúïðîñèòå íà åêîëîãèÿòà. / Àãåíöèÿ Ñîôèÿ-ïðåñ. Èíôîðìàöèîííî-äîêóìåíòàëåí öåíòúð
. - Ñîôèÿ : ÀÑÏ, 1989-2002. - 29 ñì
ISSN 0861-1424ÓÄÊ 502 | Åêîëîãèÿ |
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