Columbia subject headings:
Schickard, Wilhelm, 1592-1635--Congresses.
Science--Germany--History--17th century--Congresses.
Harvard subject headings:
Schickard, Wilhelm, 1592-1635--Congresses.
Science--Germany--History--17th century--Congresses.
Princeton subject headings:
Schickard, Wilhelm, 1592-1635--Congresses.
Science--Germany--History--17th century--Congresses.