原文: THE 4 MOST COMMON 7TH CHORD QUALITIES IN ONE EASY EXERCISE THE 48 CHORD SYSTEM FOR PIANO. Classical Period, Jazz, Pop. Easy.
译文: THE 4 MOST COMMON 7TH CHORD QUALITIES IN ONE EASY EXERCISE THE 48 CHORD SYSTEM FOR PIANO composed by Joe Procopio. 乔普罗科皮奥. 钢琴方法乐谱.