Blood group genes and Negro-white ability differences.
D000293:Adolescent; D001076:Aptitude; D044383:Black People; D001789:Blood Group Antigens; D005796:Genes; D005845:Georgia; D006801:Humans; D007361:Intelligence Tests; D007629:Kentucky; D044465:White People; D001741:Black or African American
D001789:Blood Group Antigens