= пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ - пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ 74 23 74
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| Природознание |
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| Шумен : Унив. изд.Константин Преславски |
| 1995- |
ISBN: | |
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Ч. 1. Нежива природа ISBN 954-577-015-5 |
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