Columbia subject headings:
Ethnology--Congresses.
Gerontology--Social aspects--Congresses.
Older people.
Social medicine--Congresses.
Sociology--Congresses.
Harvard subject headings:
Ethnology--Congresses
Gerontology--Social aspects--Congresses.
Sociology--Congresses
Princeton subject headings:
Ethnology--Congresses.
Gerontology--Social aspects--Congresses.
Older people.
Social medicine--Congresses.
Sociology--Congresses.