"Family size Economic aspects United States." . . "USA." . . "SOCIAL SCIENCE / Sociology / General" . . "Fécondité humaine Aspect économique États-Unis." . . "Fertility, Human Economic aspects United States." . . "Sozialwissenschaften, Soziologie, Anthropologie." . . "Gezinsgrootte." . . "Population Growth." . . "Tamaño de la familia Aspectos económicos EE.UU." . . "Revenu Répartition États-Unis." . . "SOCIAL SCIENCE / Regional Studies" . . "économie fécondité Etats-Unis." . . "Fertility, Human, United States." . . "Fertility economics." . . "Renta, Distribución de la EE. UU." . . "Fertility, Human Economic aspects." . . "Fertility." . . "Distribució de la renda." . . "Economia." . . . . "Fecondità Fattorieconomici Stati Uniti." . . "Fecunditat humana." . . "Income distribution." . . "Estats Units d'Amèrica." . . "Familia, Extensión de la Aspectos económicos EE. UU." . . "Famille Dimension Aspect économique États-Unis." . . "Natalità Stati Uniti." . . "Family size Economic aspects." . . "Bevölkerungsentwicklung." . . "Verenigde Staten." . . "Income distribution United States." . . "Socioeconomic Factors." . . "United States." . . "Família." . . "SOCIAL SCIENCE / Anthropology / General" . . "Familles Dimension Aspect économique États-Unis." . . "Vruchtbaarheid." . . . . . . . . . . . . "Fertility and scarcity in America" . "Fertility and scarcity in America"@en . . . . . . . . . . . . . . "Fertility and Scarcity in America" . . . . . . . . . "Fertility and scarcity in america"@en . . . . . . . . . . . . . . . . . . . . . . . . . . "Fertility and scarcity on America" . . . . . . . . . . "Electronic books"@en . . "SOCIAL SCIENCE / Demography." . . "SOCIAL SCIENCE / Demography" . "Distribución del ingreso EE.UU." . . "Control de la natalitat." . .