Listen to 30 Russian Folk Songs, Bylinas: No. 7, Kostryuk online. 30 Russian Folk Songs, Bylinas: No. 7, Kostryuk is an Instrumental language song and is sung by Viktoria Postnikova and Gennady Rozhdestvensky. 30 Russian Folk Songs, Bylinas: No. 7, Kostryuk, from the album Viktoria Postnikova & Gennady Rozhdestvensky. Piano Ensembles, was released in the year 2019. The duration of the song is 1:34. Download Instrumental songs online from JioSaavn.