title: Why Volunteerism Works.
authors.forename: Kim V
authors.initials: KV
authors.lastname: Engelmann
mesh_terms: D000533:Altruism; D001290:Attitude; D006240:Happiness; D006379:Helping Behavior; D006801:Humans; D009042:Motivation; D012067:Religion; D012649:Self Concept; D012945:Social Values; D014481:United States; D014838:Volunteers