Columbia subject headings:
Descartes, René, 1596-1650--Friends and associates.
France--Biography.
Picot, Claude, 1614-1668.
Harvard subject headings:
Descartes, René, 1596-1650--Friends and associates.
France--Biography.
Picot, Claude, 1614-1668.
Princeton subject headings:
Descartes, René, 1596-1650--Friends and associates.
France--Biography.
Picot, Claude, 1614-1668.