- Hunter, K.I.; Linn, M.W.
- Psycho-Social Differences between Elderly Volunteers and Non-Volunteers.
- International Journal of Aging and Human Development, 1980/81, Vol. 12, 205 - 213
- 0091 4150
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no valid measure of happiness used.