Columbia subject headings:
Aristotle.
Descartes, René, 1596-1650. Regulae ad directionem ingenii.
Knowledge, Theory of.
Harvard subject headings:
Aristotle--Knowledge, Theory of.
Descartes, René, 1596-1650. Regulae ad directionem ingenii.
Princeton subject headings:
Aristotle--Contributions in theory of knowledge.
Descartes, René, 1596-1650. Regulæ ad directionem ingenii.