Columbia subject headings:
Families--Germany--History--20th century.
Families--Religious aspects--Catholic Church.
Germany--History--1918-1933.
Socialism.
Harvard subject headings:
Families--Germany--History--20th century.
Families--Religious aspects--Catholic Church
Germany--History--1918-1933.
Socialism.
Princeton subject headings:
Catholics--Germany--History--20th century.
Families--Germany--History--20th century.
Families--Religious aspects--Catholic Church.
Germany--Social conditions--1918-1933.