{"value"=>"Includes letters from N. Marion Barrett, Leslie Bassett, Wayne Barlow, Milton Babbitt, Robert F. Baksa, Josh Baldwin, Esther Ballon, Allen Brings, Lytell Barrett, Wesley Bartlett, Leonard Basham, Robert Bates, Marion Bauer, Herbert Baumel, John Bavicchi, Irwin A. Bazelon, James Beale, Ralph A. Beals, Grant Beglarian, Jeanne Behrend, Cecil Bentz, Nicolai Berezowsky, William Bergsma, Herman Berlinski, Helen Coates (secretary to Leonard Bernstein), Aaron Copland, Wallace Berry, Vladimir Ussachevsky, and others."}