Gene & Al's Spacemen / Mercy

Whose song is Gene & Al's Spacemen / Mercy?

Artist Album
Various
Ace Story (Volume Two)
Heavy Sugar - The Pure Essence Of New Orleans R&B
Sue's Rock'N'Blues: The UK Sue Story Vol. 2
Various Artists
Heavy Sugar - Disc 3
Mac Rebennack: Good Times In New Orleans 1958-1962