[Gesellschaft der Musikfreunde] Geiringer, Karl. (1899–1989) Typed Letter SignedTLS from the important and influential musicologist responding to a letter from Roger Derby. April 3, 1961. 1 pp., on University of California, Santa Barbara stationary. Mr. Derby has inquired after the state of the collection of the Gesellschaft der Musikfreunde (GdM), an important music archive in Vienna where Geiringer had been curator from 1930 until 1938, when the GdM was shutdown by the Nazi government. "To the best of my knowledge, the