op25 Etuda c.12 c moll Op25 No1 in A flat - 'Harp Study' Op25 No9 in G flat - 'Butterfly Wings' op25/10 J. Lhévinne op25/11 R. Serkin op25/12 J. Lhévinne op25/6 A. Cory op25/7 E. Ney op25/8 T. Lambrino op25/9 E. von Sauer