KERSCHNER, Helen K.
Productive aging and senior volunteerism : is the U. S. experience relevant? / Helen K. Kerschner, Frances F. ButlerIn: Perspectives social gerontology / Robert B. Enright (ed. lit.).- Massachusets: Allyn and Bacon, 1994.- p.210-216
TRABALHO TERCEIRA IDADE ENVELHECIMENTO GERIATRIA / SOC.1598