Gerda an Opera by Dudley Glass. (Excerpts made in Oslo in 1974, 1974 Cassette-Box 689 Unit ID: NLA.MS-SAV014237 Date: 1974
Gerda-An Opera of the North., 13/11/1986 Shelf-Short OH2-2-003 Unit ID: NLA.MS-SAV014254 Date: 13/11/1986
Gerda: an opera of the north. By Dudley Glass, poem by Madeline Mason:Extract from libretto, Act I Box 7 (MS 7606) Unit ID: 22
Gerda: an opera of the north. By Dudley Glass, poem by Madeline Mason:Three different synopses of the story Box 7 (MS 7606) Unit ID: 23