title: Volunteers in the U.S.: who donates the time?
authors: Bureau of Labor Statistics.
authors: H V
authors: HV
authors: Hayghe
mesh_terms: D000367:Age Factors; D003625:Data Collection; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D008393:Marriage; D012737:Sex Factors; D014481:United States; D014838:Volunteers / Q000706:statistics & numerical data*