Columbia subject headings:
Catholic Church--Germany.
Deutsche Zentrumspartei.
Labor--Religious aspects--Christianity--Germany.
Harvard subject headings:
Catholic Church--Germany.
Deutsche Zentrumspartei.
Labor--Germany--Religious aspects--Christianity.
Labor--Religious aspects--Christianity--Germany.
Princeton subject headings:
Catholic Church--Germany.
Deutsche Zentrumspartei.
Labor--Religious aspects--Christianity--Germany.