Bakalov Ya. (2019). Higher Marine Education: Leading in Competitive Environment. Varna: Steno, ISBN 978-619-241-029-2.
Blagovest Belev
Nikola Vaptsarov Naval Academy - Varna

Bakalov Ya. (2019). Higher Marine Education: Leading in Competitive Environment. Varna: Steno, ISBN 978-619-241-029-2.
Blagovest Belev
Nikola Vaptsarov Naval Academy - Varna