TY - GEN AU - Greenfield,Emily A AU - Marks,Nadine F TI - Formal volunteering as a protective factor for older adults' psychological well-being SN - 1079-5014 PY - 2004///1018 KW - Aged KW - Aging KW - psychology KW - Female KW - Health Surveys KW - Humans KW - Identity Crisis KW - Interpersonal Relations KW - Male KW - Mental Health KW - Multivariate Analysis KW - Risk Factors KW - Self Concept KW - Volunteers N1 - Publication Type: Journal Article; Research Support, U.S. Gov't, P.H.S UR - https://doi.org/10.1093/geronb/59.5.s258 ER -