Columbia subject headings:
Harvard subject headings:
Charities--Europe--History--Congresses.
Civil society--Europe--History--19th century--Congresses.
Civil society--Europe--History--20th century--Congresses.
Religion and civil society--Europe--History--Congresses.
Princeton subject headings:
Charity organization--Europe--Religious aspects--Congresses.
Civil society--Europe--Congresses.
Humanitarianism--Religious aspects--Congresses.