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| 139 | _a6th SWS International Scientific Conference on Social Sciences, 26 August - 1 September, 2019, Albena, Bulgaria. Vol. 6. Iss. 4, Education and educational research | ||
| 245 | _a6th SWS International Scientific Conference on Social Sciences, 26 August - 1 September, 2019, Albena, Bulgaria. Vol. 6. Iss. 4, Education and educational research | ||
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| 500 | _aБиблиогр. след отд. докл. Рез. на англ. ез. | ||
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_9192553 _aобразование |
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