AMA Verlag Die AMA-Keyboard-Grifftabelle, Von Wolfgang Fiedler: Fingering chart for keyboards, 468 chords in over 1.700 chord boxes, Contents: Variant notations for chord symbols, Enharmonic changes, The names B,Bb and H, Voicings, Polychords, The chord "add2 (no3)", C#/Db, D 27, D#/Eb, E, F, F#/Gb, G, G#/Ab, A, Bb, B(H)