Back to work, on a mission. Retirees are tackling social problems.
Shapiro
J P
JP
D000368:Aged; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012179:Retirement / Q000639:trends*; D012940:Social Problems / Q000517:prevention & control*; D014481:United States; D014838:Volunteers / Q000706:statistics & numerical data*