Izvornik: Masterwork Classics Duets, Level 1. Gurlitt. Easy Piano sheet music. Piano Solo sheet music. Beginning. For Piano. Book.
Prijevod: Remek Classics Duets, Level 1. Proljeće valcer, op. 432, broj 6.. Valcer, Op. 87, br 35. Valcer, Op. 87, br 35.