Columbia subject headings:
Culture--Congresses.
Families--Congresses.
Households--Congresses.
Social change--Congresses.
Harvard subject headings:
Biblioteca "La familia".
Culture--Congresses.
Families--Congresses.
Households--Congresses.
Social change--Congresses
Princeton subject headings:
Culture--Congresses.
Families--Congresses.
Households--Congresses.
Social change--Congresses.