Columbia subject headings:
Descartes, René, 1596-1650.
Schoock, Martinus, 1614-1669.
Harvard subject headings:
Descartes, René, 1596-1650.
Schoock, Martinus, 1614-1669.
Princeton subject headings:
Descartes,Renʹe, 1596-1650--Correspondence.
Voet, Gijsbert, 1589-1676.