RT Journal Article SR Electronic T1 Backgrounds of Human Cytogenetics: a Bibliography JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 68 OP 69 DO 10.1136/jmg.28.1.68-a VO 28 IS 1 A1 S H Roberts YR 1991 UL http://jmg.bmj.com/content/28/1/68.2.abstract AB