Commons Attribution-Share Alike 4.0 truetrue English Rumen Surdzhiyski - Bulgarianfilm director and Stefan Danailov - Bulgarian actor - Personal archive
English Prof. Nikolay Radulov during the filming of the first episode of the NBU Visual Archive, June 29, 2023 Bulgarian Проф. Николай Радулов по време на снимките
English Prof. Nikolay Radulov during the filming of the first episode of the NBU Visual Archive, June 29, 2023 Bulgarian Проф. Николай Радулов по време на снимките