Columbia subject headings:
Aging--Psychological aspects--Congresses.
Aging--Social aspects--Congresses.
Gerontology--Social aspects--Congresses.
Older people--Social aspects--Congresses.
Harvard subject headings:
Aging--Psychological aspects--Congresses.
Aging--Social aspects--Congresses.
Gerontology--Social aspects--Congresses.
Older people--Social conditions--Congresses.
Princeton subject headings: