Columbia subject headings:
History--Research--Congresses.
Protestantism--Congresses.
Spini, Giorgio--Congresses.
Harvard subject headings:
History--Research--Congresses.
Protestantism--Congresses.
Spini, Giorgio--Congresses.
Princeton subject headings:
History--Research--Congresses.
Protestantism--Congresses.
Spini, Giorgio--Congresses.