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| [ñáîðíèê] |
| Íàöèîíàëíà ó÷èëèùíà êîíôåðåíöèÿ `Ñïîäåëåíè ïåäàãîãè÷åñêè ïðàêòèêè â ïðåïîäàâàíåòî íà ïðèðîäíè íàóêè` | ÐÀ6182 |
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| Ñîôèÿ |
| 20 ñì |
| 2019- |
| ãîäèøíèê |
ISSN: | 2683-0744 |
| 5 |
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| | Older Receipts (by Years): | 2019 |
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