Richards B.W. et al. 1981
Richards B.W., Sylvester P. E., and Brooker C., 1981. Fragile X- linked mental retardation: The Martin-Bell syndrome. J. Merit. Defic. Res. 25: 253-256.
Richards B.W., Sylvester P. E., and Brooker C., 1981. Fragile X- linked mental retardation: The Martin-Bell syndrome. J. Merit. Defic. Res. 25: 253-256.
