Erik's Music Database - discography search: performer is "Mariana Belicheva" and performer is "Muzhka Pevcheska Grupa Ot Selo Mustrak" and performer is "Ekaterina Genoveva Sirakova" and performer is "Gergana Tsekova" and performer is "Trakiiska Troika Before 1941" and performer is "Boris Mashalov"