Challenges in higher education and research in the 21st century : proceedings of the ... international conference
Challenges in higher education and research in the 21st century : proceedings of the ... international conference - Sofia : Heron Press, 2019. - 30 см
До 2018 регистрирано в Бълг. книгопис. Сер. 1.
ISSN 2683-0337 = Challenges in higher education and research in the 21st century
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До 2018 регистрирано в Бълг. книгопис. Сер. 1.
ISSN 2683-0337 = Challenges in higher education and research in the 21st century