Columbia subject headings:
Families--Canada--History--Abstracts.
Families--United States--History--Abstracts.
Family services--Canada--Abstracts.
Family services--United States--Abstracts.
Harvard subject headings:
Canada--Genealogy--Abstracts.
Families--Canada--History--Abstracts.
Families--United States--History--Abstracts.
Family services--Canada--Abstracts.
Family services--United States--Abstracts.
United States--Genealogy--Abstracts.
Princeton subject headings:
Families--Canada--History--Abstracts.
Families--Services for--Canada--Abstracts.
Families--Services for--United States--Abstracts.
Families--United States--History--Abstracts.