Columbia subject headings:
Harvard subject headings:
Families--United States--Bibliography.
Single-parent families--United States--Bibliography.
Stepfamilies--United States--Bibliography.
Unmarried couples--United States--Bibliography.
Princeton subject headings:
Families--United States--Bibliography.
Single-parent families--United States--Bibliography.
Stepfamilies--United States--Bibliography.
Unmarried couples--United States--Bibliography.