Columbia subject headings:
Harvard subject headings:
Economic development--Germany--History--20th century.
Old age pensions--Government policy--Germany--History--20th century.
Pensions--Germany--History--20th century.
Pensions--Government policy--Germany--History--20th century.
Princeton subject headings:
Old age pensions--Germany--History.
Pensions--Government policy--Germany.
Retirement income--Germany.
Social security--Germany--History.
Welfare state.