Columbia subject headings:
Families--Europe--Case studies.
Madrid (Spain)--Social conditions.
Mainz (Rhineland-Palatinate, Germany)--Social conditions.
Niort (France)--Social conditions.
Harvard subject headings:
Families--Europe--Case studies.
Madrid (Spain)--Social conditions.
Mainz (Rhineland-Palatinate, Germany)--Social conditions.
Niort (France)--Social conditions.
Princeton subject headings: