Original: Tchaikovsky and More - Volume IV. Piano Concerto No. 1 in Bb Minor, Op. 23. Piano Concerto No. 2 in G Major, Op. 44. Viola.
Translation: Piano Concerto No. 1 in B-flat Minor, Op 23. Piano Concerto No. 2 in G Major, Op 44. March Slav, Op. 31. Violet.