"hymnologi" . . "Nordeuropa." . . "Geschichte (umfassend)" . . . . "Volkslied." . . "Kirchenmusik." . . "Geschichte" . . "salmesang" . . "folkesang" . . "Protestantismus." . . "Baltikum." . . . . . "Criticism, interpretation, etc"@en . "Criticism, interpretation, etc" . . . . . . . . . . . . "Spiritual folk singing Nordic and Baltic Protestant traditions"@en . . . . "Spiritual folk singing : Nordic and Baltic protestant traditions" . . "Spiritual folk singing : Nordic and Baltic Protestant traditions"@en . . "Hymns"@en . "Hymns" . . . . . . . . . . . . . . .