"6324" . . "6324" . "6324 781.47 |c Met begeleiding |d With accompaniment 783.12 |c Duetten (verschillende zangstemmen) |d Duets (different singing voices) 783.12147" . . "783.12 |c Duetten (verschillende zangstemmen) |d Duets (different singing voices)" . "781.47 |c Met begeleiding |d With accompaniment" . . "783.12147" . .