PT - JOURNAL ARTICLE AU - G R Fraser TI - Genetical aspects of severe visual impairment in childhood. AID - 10.1136/jmg.7.3.257 DP - 1970 Sep 01 TA - Journal of Medical Genetics PG - 257--267 VI - 7 IP - 3 4099 - http://jmg.bmj.com/content/7/3/257.short 4100 - http://jmg.bmj.com/content/7/3/257.full SO - J Med Genet1970 Sep 01; 7