Columbia subject headings:
Harvard subject headings:
Astronomy--Germany--Berlin--History--18th century--Congresses.
Astronomy--History--18th century--Congresses.
Kirch, Gottfried, 1639-1710--Congresses.
Princeton subject headings:
Astronomy--Germany--Berlin--History--18th century--Congresses.
Astronomy--History--18th century--Congresses.
Kirch, Gottfried, 1639-1710--Congresses.