Lotte Lehmann master classes. - Lehmann, Lotte.; Glass, Beaumont,; Koldofsky, Gwendolyn,; Brahms, Johannes,; Brahms, Johannes,; Wolf, Hugo,; Schubert, Franz,; Schubert, Franz,; Schumann, Robert,; Brahms, Johannes,; Wolf, Hugo,; Schumann, Robert,; et al. (VAI,, 2005)