RT Journal Article SR Electronic T1 Karyotypes of cultured cells from foetal membranes of normal newborns. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 224 OP 226 DO 10.1136/jmg.5.3.224 VO 5 IS 3 A1 J A Böök A1 B Kjessler A1 B Santesson YR 1968 UL http://jmg.bmj.com/content/5/3/224.abstract AB