États-Unis (1) Motherless families (1) Dynamics (1) Development (1) Family relationships (1) Children (1) Nineteen seventies (1) Year (1) Time (1) Single-parent families (1) Fatherless families (1) Farmhouses (1) Economic history (1) Cost and standard of living (1) Influence (1) Sizes (1) Structure (1) Population (1) Family (1) Children, White (1) Historia económica (1) Coste de vida (1) Nivel de vida (1) Dinámica (1) Tiempo (1) Viviendas rurales (1) Mas (1) Famille (1) Enfant (1) Temps (1)