Christoph Wolff (born May 24, 1940) is a German-born musicologist, presently on the faculty of Harvard University. Born and educated in Germany, Wolff studied organ and historical keyboard instruments, musicology and art history at the Universities of Berlin, Erlangen, and Freiburg, receiving a performance diploma in 1963 and a Dr. Phil. in 1966. Wolff taught the history of music at Erlangen, Toronto, Princeton, … Wikipedia
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Bach Manuscripts: Recovery of the Hidden Archive. In an hour of video and supporting material, Professor Wolff recounts what began as a dissertation and culminated in his life's work: the recovery of over a half-million pages of manuscripts which had disa athome.harvard.edu/dh/wolff.html
Hans T. David and Arthur Mendel, revised and enlarged by Christoph Wolff (New York & London: W. W. Norton, 1998): 605 pp. www.music.fas.harvard.edu/faculty/wolff.html