钢琴谱
平均律第一册：第21首降B大调赋格（BWV 866）
Fugue No. 21 in B-flat Major, BWV 866
作曲：约翰·塞巴斯蒂安·巴赫。
选自巴赫《平均律钢琴曲集》第一册第21组。依据 Knute Snortum 的数字制谱整理，保留原谱音乐内容，采用 AFTERTONE A4 版式。此改编版本按 CC BY-SA 4.0（署名—相同方式共享）许可发布。来源：来源版本（GitHub）
原版说明（English）
Free printable piano sheet music for Fugue No. 21 in B-flat Major, BWV 866, from The Well-Tempered Clavier, Book 1. AFTERTONE edition adapted from Knute Snortum's digital engraving. A4 layout, English headings and edition label prepared for AFTERTONE; source musical content retained. Source: Source edition (GitHub). This adaptation is licensed under Creative Commons Attribution-ShareAlike 4.0: CC BY-SA 4.0.