Columbia subject headings:
Harvard subject headings:
Encyclopedias and dictionaries--History and criticism--Congresses.
Learning and scholarship--History--16th century--Congresses.
Learning and scholarship--History--17th century--Congresses.
Princeton subject headings:
Encyclopedias and dictionaries--History and criticism--Congresses.
Learning and scholarship--History--16th century--Congresses.
Learning and scholarship--History--17th century--Congresses.