Columbia subject headings:
Cities and towns--Congresses.
Families--Congresses.
Parenthood--Congresses.
Social interaction--Congresses.
Social structure--Congresses.
Harvard subject headings:
Cities and towns--Congresses
Families--Congresses.
Parenthood--Congresses.
Social interaction--Congresses.
Social structure--Congresses.
Princeton subject headings:
Cities and towns--Congresses.
Families--Congresses.
Parenthood--Congresses.
Social interaction--Congresses.
Social structure--Congresses.