Columbia subject headings:
Concubinage--Germany.
Marriage (Canon law)
Marriage law--Germany.
Unmarried couples--Legal status, laws, etc.--Germany.
Harvard subject headings:
Concubinage--Germany.
Marriage (Canon law).
Marriage law--Germany.
Unmarried couples--Germany.
Unmarried couples--Legal status, laws, etc.--Germany.
Unmarried couples--Religious aspects--Christianity
Princeton subject headings: