Columbia subject headings:
Harvard subject headings:
Age and employment--Germany.
Collective labor agreements--Iron industry--Germany.
Collective labor agreements--Steel industry--Germany.
Older people--Employment--Germany.
Older people--Employment--Law and legislation--Germany.
Princeton subject headings:
Age and employment--Germany.
Collective labor agreements--Iron industry--Germany.
Collective labor agreements--Steel industry--Germany.
Older people--Employment--Germany.
Older people--Employment--Law and legislation--Germany.