Erik's Music Database - discography search: performer is "Koco Bushinovski Mirche Petrovski" and performer is "Trakiiska Troika Before 1941" and performer is "Boika Dureva" and performer is "El Bitsina B Prangova El Okolska" and performer is "Georgi Chilingirov Stefan Zahmanov" and record label is Supraphon