Fertility ratio: its relationship to mental ability, school achievement, and race.
D000124:Achievement; D000293:Adolescent; D000328:Adult; D001723:Birth Rate; D002648:Child; D005260:Female; D005298:Fertility; D005845:Georgia; D006801:Humans; D007361:Intelligence Tests; D008297:Male; D008433:Mathematics; D008875:Middle Aged; D011158:Population Growth; D044469:Racial Groups; D011932:Reading; D012111:Residence Characteristics; D012574:Schools