title: [The only child and the first-born child, a comparative child psychiatry study].
mesh_terms: D001722:Birth Order; D002648:Child; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000235:genetics* / Q000523:psychology; D009863:Only Child / Q000523:psychology*
vernacular_title: Autoreferat: Einzelkind und Erstgeborenes, eine vergleichende kinderpsychiatrische Untersuchung.