Original: Beethoven, Ludwig van. 2 pianos 4 hands. Universal Edition, n. Suppress your rating ', SHADOW, true,DELAY,0. Op.15. ca.
Oversettelse: Undertrykke din rating ', SHADOW, sant, DELAY, 0. Piano Concerto No.1. To pianoer fire hender. Thern, Willi Publisher. Wien. 1901.
