Columbia subject headings:
Harvard subject headings:
Jesuits--Germany--Correspondence.
Kircher, Athanasius, 1602-1680--Correspondence.
Mathematicians--Germany--Correspondence.
Schott, Gaspar, 1608-1666--Correspondence.
Scientists--Germany--Correspondence.
Princeton subject headings:
Kircher, Athanasius, 1602-1680--Correspondence.
Schott, Gaspar, 1608-1666--Correspondence.