"783.1266 |c Sopranen - duetten |d Sopranos - duets" . . "781.47 |c Met begeleiding |d With accompaniment" . . "6689" . . . "6689 781.47 |c Met begeleiding |d With accompaniment 782.47 |c Liederencycli |d Song cycles 783.1266 |c Sopranen - duetten |d Sopranos - duets 783.126647147" . "783.126647147" . "782.47 |c Liederencycli |d Song cycles" . . "6689" .