The National Edition was based on sources originated from the composer, mainly autographs, copies of autographs and first editions with the composer's corrections, and pupils' copies with Chopin's annotations. In cases when original sources were lacking, the closest possible materials were used.

By Carl Reinecke Edited by Maurice Hinson Series: Alfred Masterwork Edition Category: Piano Duet (1 Piano, 4 Hands) Format: Book Instrument: Piano Level: Late Intermediate / Early Advanced

Piano Technique Series: Piano Method Publisher: G. Schirmer, Inc. Composer: Carl Czerny Editor: Max Vogrich

By Stephen Heller Edited by Willard A. Palmer Series: Alfred Masterwork Edition Category: Piano Collection Format: Book Instrument: Piano Level: Intermediate / Late Intermediate