found: Her The art of Joan La Barbara [SR] p1985:container (composer; soprano; b. 1947, Philadelphia)
found: Glass, P. Music in 12 parts. Parts 1 & 2 [SR] p1974:container (Joan LaBarbara, voice and electronic organ)
found: Int. ww in mus., 10th ed.(La Barbara, Joan Linda; b. 6/8/47, Philadelphia)
found: Cohen, A.I. Int. enc. of women composers, 1981(La Barbara, Joan; Amer. composer and singer; b. 6/8/47, Philadelphia)
found: Joan La Barbara WWW site, Oct. 19, 2004:resume (Joan La Barbara; maiden name: Joan Linda Lotz)
found: Grove music online WWW site, Oct. 19, 2004(La Barbara (née Lotz; Subotnick), Joan; b. June 8, 1947, Philadelphia)