'… a wide-ranging, handsomely presented, pedagogical survey that is intended to explain "how scholars and students should work with and think about the composer's working manuscripts" … invaluable resource … The contributing authors strike a fair balance between practical guidance and specific research concerns, and there is a useful appendix that lists the addresses of thirty-eight archives and institutes that house twentieth-century music manuscripts … offers sound advice … invaluable … The author's extensive knowledge of Bartok's sketches is amply illustrated in this chapter … this information is fascinating.' Twentieth-Century Music