Original: Wagner Opera Vocal Scores. Die Walkure, Act I, Part 2 - Du bist der Lenz. Version 2.0. Richard Wagner. Voice sheet music. 2 CD-ROMs.
Oversettelse: Wagner Opera Klavierauszüge. Siegfried, Act I, del 1 - Det sang Voglein så velsignet i Lenz. Versjon 2.0. Tale noter. Versjon 2.0.