Columbia subject headings:
Age and employment--United States--History.
Age discrimination in employment--United States--History.
Older people--Employment--United States--History.
Harvard subject headings:
Age and employment--United States--History.
Age discrimination in employment--United States--History.
Older people--Employment--United States--History.
Princeton subject headings:
Age and employment--United States--History.
Age discrimination in employment--United States--History.
Older people--Employment--United States--History.