PT - JOURNAL ARTICLE AU - A. W. Johnston TI - Essentials of Medical Genetics AID - 10.1136/jmg.8.4.546 DP - 1971 Dec 01 TA - Journal of Medical Genetics PG - 546--546 VI - 8 IP - 4 4099 - http://jmg.bmj.com/content/8/4/546.1.short 4100 - http://jmg.bmj.com/content/8/4/546.1.full SO - J Med Genet1971 Dec 01; 8