Sessions location and date: # A1 - New York, January 6, 1946. # A2 - New York, April 15, 1937. # A3 - New York, March 18, 1938. # A4 - Hollywood, July 6, 1937. # A5 - New York, April 13, 1938. # A6 - Symphony Hall, Boston, November 30, 1947. # B1 - October 23, 1962. # B2 - September 4, 1958. # B3 - July 11, 1961. # B4 - November 18, 1959.