His The function of set structure in the twelve-tone system, 1992 t.p. (Milton Byron Babbitt)
New Grove dict. of American music (Babbitt, Milton (Byron), b. Philadelphia PA, 5-10-1916)
New York times WWW site, Jan. 31, 2011 (in obituary published Jan. 29: Milton Babbitt; b. Milton Byron Babbitt, May 10, 1916, Philadelphia; d. Saturday [Jan. 29, 2011], Princeton, N.J., aged 94; influential composer, theorist, and teacher who wrote music that was intensely rational and for many listeners impenetrably abstruse)