TY - JOUR T1 - Genetical aspects of severe visual impairment in childhood. JF - Journal of Medical Genetics JO - J Med Genet SP - 257 LP - 267 DO - 10.1136/jmg.7.3.257 VL - 7 IS - 3 AU - G R Fraser Y1 - 1970/09/01 UR - http://jmg.bmj.com/content/7/3/257.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -