Lyubomir Obretenov(1925-1988)
- Director
Lyubomir Obretenov was born on 15 August 1925 in Sofia, Bulgaria. He was a director, known for Vavedenie v teoriyata na kristalniya rastezh (1965), Kristalna orientatziya na galvanichnite pokritiya (1966) and Kristali dvoynitzi (1969). He died on 30 October 1988 in Sofia, Bulgaria.