LEVIN L. STEFAN /red./ 538,508 Genetic and environmental hearing losg: syndromic and nonsyndromic. The Second Annual Symposium on Craniofacial Dysmorphology held in Chicago, Illionois, June 24, 1979. Ed-s: L. Stefan Levin, Connie H. Knight. Ass. ed.: Sue Conde Greene. New York 1980 Allan R. Liss, Inc. 8 s. IX, nlb. 1, 92, il. March of Dimes Birth Defects Foundation Birth Defects: Orginal Article ser. vol. 16, nr 7