We have pieces in the following keys for Voice:
1-4 of 4 Voice Pieces in Gb major
Debussy
Ariettes Oubliees, Green (Aquarelles No.1)
Debussy
Green from Ariettes Oubliees
Puccini
Un Bel Di Vedremo (One Fine Day, from Madama ...
Dvorak
Rusalkas Song to the Moon