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Klavierbüchlein (Little keyboard-book). Title given by J. S. Bach to 3 colls. of his kbd. mus.:(1) Pieces for the instruction of his eldest son, Wilhelm Friedemann Bach, 1720.(2) Similar but small coll. for his 2nd wife, Anna Magdalena, 1722.(3) Larger coll. for his wife, 1725, incl. some vocal pieces.