Tracks 6, 10-12 recorded New York, October 8, 1946 Tracks 8, 9 recorded New York, May 23, 1947 Tracks 7, 17-20 recorded New York, December 31, 1947 Tracks 13-16 recorded New York, January 11, 1949 Track 5 recorded New York, March 4, 1949 Track 4 recorded New York, March 14, 1949 Tracks 1-3 recorded New York, May 16, 1949 Tracks 21 recorded Carnegie Hall, New York, December 24, 1949