Izvornik: Beer Barrel Polka composed by Lew Brown. C4-F5. Wladimir A. Timm. - Digital Sheet Music. Piano. Vocal. Guitar. Voice, range.
Prijevod: Pivo Bačva Polka skladao Lew Brown. W. Timm. - Digitalni Sheet Music. Plan. Vokalni. Gitara. Glas, raspon. MN0050710.