title: [Effects of heredity on scholastic achievement--study of twins].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D004521:Educational Measurement; D004777:Environment; D005260:Female; D005826:Genetics, Medical; D006801:Humans; D007360:Intelligence; D008297:Male; D011247:Pregnancy; D014427:Twins