48. национална конференция на учителите по химия / 48th National Conference of Teachers of Chemistry
| Autor: | Boiadjieva, Elena |
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| Zdroj: | Химия. Природните науки в образованието / Chemistry. Bulgarian Journal of Science Education. 28(6):687-690 |
| Databáze: | Central and Eastern European Online Library (CEEOL) |
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