Wolff, Christoph.
Bach: essays on his life and music /
Christoph Wolf 
. - Cambridge : London : Harvard University Press,  1999 
. - xiv, 461 p.  ill., not.  25 cm. 
<br/><label>  ISBN: </label>0-674-05926-3 
<br/><br/><label>Subjects--Personal Names: </label><br/>Bach, Johann Sebastian 1685-1750